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Articles 781 - 810 of 1105
Full-Text Articles in Chemistry
Chemical And Electrochemical Studies Of Cl2Fes2Ms2Fecl2N- Clusters [M = Mo (N = 2), W (N = 2), V (N = 3)], Yanming Liu, Jinhai Chen, Michael D. Ryan
Chemical And Electrochemical Studies Of Cl2Fes2Ms2Fecl2N- Clusters [M = Mo (N = 2), W (N = 2), V (N = 3)], Yanming Liu, Jinhai Chen, Michael D. Ryan
Chemistry Faculty Research and Publications
The electrochemistry and spectroelectrochemistry of [Cl2FeS2MS2FeCl2]n- clusters (where n = 2 for M = Mo and W and n = 3 for M = V; Ia, Ib, and Ic, respectively) and the dimetal complex [Cl2FeS2MoS2]2- (IIIa) were examined in order to characterize the structures and properties of the one-electron-reduced complexes. A stable reduction product for Ia was observed spectroelectrochemically at −1.05 V, which could be oxidized back to the starting complex. Reduction at more negative potentials caused …
Studies On The Preparation Of Protomycinolide Iv: Enantioselective Synthesis Of The C3–C9 Segment, James Thomas Wasicak, William A. Donaldson
Studies On The Preparation Of Protomycinolide Iv: Enantioselective Synthesis Of The C3–C9 Segment, James Thomas Wasicak, William A. Donaldson
Chemistry Faculty Research and Publications
The C3–C9 segment, (−)-16, of the polyene macrolide antibiotic protomycinolide IV (1a) was prepared in optically pure form from commercially available methyl (S)-2-methyl-3-hydroxypropionate in 12 steps giving 17% yield.
Photoinduced Coupling Of Acetylenes And Quinone In The Solid State As Preorganized Donor−Acceptor Pairs, E. Bosch, S. M. Hubig, Sergey V. Lindeman, Jay K. Kochi
Photoinduced Coupling Of Acetylenes And Quinone In The Solid State As Preorganized Donor−Acceptor Pairs, E. Bosch, S. M. Hubig, Sergey V. Lindeman, Jay K. Kochi
Chemistry Faculty Research and Publications
Crystalline electron donor−acceptor (EDA) complexes of various diarylacetylenes (DA) and dichlorobenzoquinone (DB) are isolated and structurally characterized by X-ray crystallography. Deliberate excitation of either the DB acceptor at λDB = 355 nm or the 1:2 [DA, 2DB] complex at λCT = 532 nm in the solid state leads to [2 + 2] cycloaddition and identical (isomeric) mixtures of the quinone methide products. Time-resolved (ps) diffuse reflectance spectroscopy identifies the ion-radical pair [DA•+, DB•-] as the reactive intermediate derived by photoinduced electron transfer in both photochemical …
The CuA Center Of A Soluble Domain From Thermus Cytochrome Ba3. An Nmr Investigation Of The Paramagnetic Protein. A Proton Nmr Study Of The Paramagnetic Active Site Of The CuA Variant Of Amicyanin, Richard C. Holz
Chemistry Faculty Research and Publications
No abstract provided.
Preparation And Structures Of Crystalline Aromatic Cation-Radical Salts. Triethyloxonium Hexachloroantimonate As A Novel (One-Electron) Oxidant, Rajendra Rathore, A. S. Kumar, Sergey V. Lindeman, Jay K. Kochi
Preparation And Structures Of Crystalline Aromatic Cation-Radical Salts. Triethyloxonium Hexachloroantimonate As A Novel (One-Electron) Oxidant, Rajendra Rathore, A. S. Kumar, Sergey V. Lindeman, Jay K. Kochi
Chemistry Faculty Research and Publications
Triethyloxonium hexachloroantimonate [Et3O+SbCl6-] is a selective oxidant of aromatic donors (ArH), and it allows the facile preparation and isolation of crystalline paramagnetic salts [ArH+•, SbCl6-] for the X-ray structure determination of various aromatic cation radicals. The mechanistic relationship between the Meerwein salt [Et3O+SbCl6-] and the pure Lewis acid oxidant SbCl5 is based on a prior ethyl transfer from oxygen to chlorine within the ion pair.
Disproportionation And Structural Changes Of Tetraarylethylene Donors Upon Successive Oxidation To Cation Radicals And To Dications, Rajendra Rathore, Sergey V. Lindeman, A. S. Kumar, Jay K. Kochi
Disproportionation And Structural Changes Of Tetraarylethylene Donors Upon Successive Oxidation To Cation Radicals And To Dications, Rajendra Rathore, Sergey V. Lindeman, A. S. Kumar, Jay K. Kochi
Chemistry Faculty Research and Publications
The stepwise (one-electron) chemical oxidation of the tetraphenylethylene donor and its substituted analogues (D) can be carried out by electron exchange with aromatic cations or antimony(V) oxidants to selectively afford the cation radical (D+•) initially and then the dication (D2+). The ready interchange of the latter establishes the facile disproportionation (i.e., 2D+• ⇌ D2+ + D) that was originally examined by only transient electrochemical techniques. The successful isolations of the crystalline salts of the tetraanisylethylene cation radical (1+•) as well as the …
Proton Nuclear Magnetic Resonance Investigation Of The [2fe-2s]1--Containing “Rieske-Type” Protein From Xanthobacter Strain Py2, Richard C. Holz, Frederick J. Small, Scott A. Ensign
Proton Nuclear Magnetic Resonance Investigation Of The [2fe-2s]1--Containing “Rieske-Type” Protein From Xanthobacter Strain Py2, Richard C. Holz, Frederick J. Small, Scott A. Ensign
Chemistry Faculty Research and Publications
Proton NMR spectra of the Rieske-type ferredoxin from Xanthobacter strain Py2 were recorded in both H2O and D2O buffered solutions at pH 7.2. Several well-resolved hyperfine-shifted 1H NMR signals were observed in the 90 to −20 ppm chemical shift range. Comparison of spectra recorded in H2O and D2O buffered solutions indicated that the signals at −11.4 (L) and −15.5 (M) ppm were solvent-exchangeable and thus were assigned to the two histidine Nε2H protons. The remaining observed signals were assigned based upon chemical shift, T1 values, and one-dimensional …
Preparation Of Organometallic Complexed Sugars: Hetero Diels−Alder Reactivity Of Tricarbonyl(Formyltrimethylenemethane)- Iron, Paul J. Kleindl, William A. Donaldson
Preparation Of Organometallic Complexed Sugars: Hetero Diels−Alder Reactivity Of Tricarbonyl(Formyltrimethylenemethane)- Iron, Paul J. Kleindl, William A. Donaldson
Chemistry Faculty Research and Publications
No abstract provided.
The Electrochemical Oxidation Of Organic Selenides And Selenoxides, Michael D. Ryan, Jiyi Yau, Michael Hack
The Electrochemical Oxidation Of Organic Selenides And Selenoxides, Michael D. Ryan, Jiyi Yau, Michael Hack
Chemistry Faculty Research and Publications
The electrochemical oxidation of alkyl and aryl selenides was investigated in acetonitrile. The oxidation of diphenyl selenide and di(4‐methylphenyl) selenide led primarily to the formation of their respective selenoxides, which were identified by exhaustive coulometric oxidation and and analysis of the products. The selenoxide itself was not observed in the cyclic voltammetry of the selenide for two reasons: first, the protonation of the selenoxide by the acid formed from the reaction of water with the cation radical and second, the formation of a selenoxide hydrate. The formation of the hydrate with diphenyl selenoxide was verified by isolation of the dimethoxy …
Mechanistic Studies On The Aminopeptidase From Aeromonas Proteolytica: A Two-Metal Ion Mechanism For Peptide Hydrolysis, Guanjing Chen, Tanya Edwards, Ventris M. D'Souza, Richard C. Holz
Mechanistic Studies On The Aminopeptidase From Aeromonas Proteolytica: A Two-Metal Ion Mechanism For Peptide Hydrolysis, Guanjing Chen, Tanya Edwards, Ventris M. D'Souza, Richard C. Holz
Chemistry Faculty Research and Publications
The aminopeptidase from Aeromonas proteolytica (AAP) is uncompetitively inhibited by fluoride ion at pH 8.0 with an inhibition constant (Ki) of 30 mM. Thus, fluoride inactivates AAP only after substrate binding, and only a single fluoride ion binds to AAP. On the other hand, chloride ion does not inhibit AAP up to concentrations of 2 M at pH 8.0. The pH dependence of fluoride inhibition of AAP was measured over the pH range 6.0−9.5. Between pH values of 6.0 and 9.0, fluoride ion acts as a pure uncompetitive inhibitor of AAP, and the Ki increases from …
Reactions Of Hydroxylamine With Metal Porphyrins, In Kyu Choi, Yanming Liu, Zhongcheng Wei, Michael D. Ryan
Reactions Of Hydroxylamine With Metal Porphyrins, In Kyu Choi, Yanming Liu, Zhongcheng Wei, Michael D. Ryan
Chemistry Faculty Research and Publications
The reaction of hydroxylamine with a series of metal porphyrins was examined in methanol/chloroform media. The reductive nitrosylation reaction was observed for the manganese and iron porphyrins, leading to a nitrosyl complex that precipitated out of the solution in good isolatable yield (80−90%). This reaction could be used synthetically for the generation of iron and manganese porphyrin nitrosyl complexes and was particularly useful for making isotopically labeled nitrosyl complexes. On the other hand, CoII(TPP) and Cr(TPP)(Cl) did not react with hydroxylamine under anaerobic conditions. With trace amounts of oxygen, the reaction of CoII(TPP) with hydroxylamine led …
Preparation And Reactivity Of Acyclic (Pentadienyl)Iron(1+) Cations: Applications To Organic Synthesis, William A. Donaldson
Preparation And Reactivity Of Acyclic (Pentadienyl)Iron(1+) Cations: Applications To Organic Synthesis, William A. Donaldson
Chemistry Faculty Research and Publications
No abstract provided.
Hexakis(Dimethylformamide)Bis(Hexaphenylcyclohexasiloxanehexaolato)Hexacopper(Ii) Dimethylformamide Solvate, Sergey V. Lindeman, Olga I. Shchegolikhina, Yulia A. Molodtsova, Alexandr A. Zhdanov
Hexakis(Dimethylformamide)Bis(Hexaphenylcyclohexasiloxanehexaolato)Hexacopper(Ii) Dimethylformamide Solvate, Sergey V. Lindeman, Olga I. Shchegolikhina, Yulia A. Molodtsova, Alexandr A. Zhdanov
Chemistry Faculty Research and Publications
The sandwich-like title complex, hexakis(dimethylformamide)-1O,2O,3O,4O,5O,6O-bis[2,4,6,8,10,12-hexaphenylsiloxane-2,4,6,8,10,12-hexaolato(6-)-1:22O1,2:32O2,3:42O3,- 4:52O4,5:62O5,1:62O6]hexacopper(II) tetrakis(dimethylformamide) solvate, [Cu6(C3H7NO)6{(C6H5)6O12Si6}2].4C3H7NO, is comprised of two regular crown-shaped macrocyclic hexadentate organosiloxanolate ligands chelating a flat Cu6 hexagon, as in the ethanol-solvated analogue investigated previously. The title complex has a more distorted shape …
N-Methylbenzothiazole-2(3H)-Selone, C8H7Nsse, Steinar Husebye, Sergey V. Lindeman, Martin D. Rudd
N-Methylbenzothiazole-2(3H)-Selone, C8H7Nsse, Steinar Husebye, Sergey V. Lindeman, Martin D. Rudd
Chemistry Faculty Research and Publications
The crystal structure of N-methyl1,3-benzothiazole-2(3H)-selone, (mbts) has been studied to estimate the changes in the molecular geometry of the mbts ligand upon coordination. Hypervalent complexes of mbts with TeII and II have been studied by us previously. A significant elongation of the Se=C bond [from 1.817 (7) in mbts to 1.85-1.88 Å in the complexes] was found, but there were no significant changes in the other geometric parameters of the ligand. The only other bond-length decrease of note was for SeC-NMe [from 1.35 (1) in mbts to 1.32-1.34 Å in the complexes]. Thus, only the …
Two-Dimensional 1H Nmr Studies On Octahedral Nickel(Ii) Complexes, Richard C. Holz, Evgenij A. Evdokimov, Feben T. Gobena
Two-Dimensional 1H Nmr Studies On Octahedral Nickel(Ii) Complexes, Richard C. Holz, Evgenij A. Evdokimov, Feben T. Gobena
Chemistry Faculty Research and Publications
The dinucleating ligand ethylene glycol−bis(β-aminoethyl ether) N,N,N‘,N‘-tetrakis[(2-(1-ethylbenzimidazoyl)] (EGTB-Et; 1) was used to synthesize the dinuclear Ni(II) tetraacetonitrile complex cation [Ni2(EGTB-Et)(CH3CN)4]2+ (2): triclinic space group P1̄ (a = 12.273(5) Å, b = 12.358(7) Å, c = 12.561(6) Å, α = 90.43(4)°, β = 110.26(3)°, γ = 99.21 (4)°, and Z = 1). The structure shows two identical octahedral Ni(II) centers each bound to two benzimidazole ring nitrogen atoms, one amine nitrogen atom, an ether oxygen atom, and two acetonitrile nitrogen atoms. The …
Characterization Of The Structural And Electronic Properties Of Spin-Coupled Dinuclear Copper(Ii) Centers By Proton Nmr Spectroscopy, Julie M. Brink, Rachel A. Rose, Richard C. Holz
Characterization Of The Structural And Electronic Properties Of Spin-Coupled Dinuclear Copper(Ii) Centers By Proton Nmr Spectroscopy, Julie M. Brink, Rachel A. Rose, Richard C. Holz
Chemistry Faculty Research and Publications
The 1H NMR spectra of a series of well-characterized μ-phenoxo and μ-alkoxo spin-coupled dicopper(II) complexes have been investigated. The complexes studied were [Cu2(BPMP)(OH)]2+ (1) (BPMP = 2,6-bis[[bis(2-pyridylmethyl)amino]methyl]-4-methylphenol), [Cu2(CH3HXTA)(OH)]2- (2) (CH3HXTA = N,N ‘-(2-hydroxy-5-methyl-1,3-xylylene)bis(N-carboxymethylglycine), [Cu2(m-XYL)(OH)]2+ (3) (m-XYL = 2,6-bis[[bis(2-pyridylethyl)amino]methyl]phenol), and [Cu2(TBHP)(OAc)]2+ (4) (TBHP = N,N,N ‘,N ‘-tetrakis[(2-benzimidazolyl)methyl]-2-hydroxy-1,3-diaminopropane). The magnetic interactions of these complexes range from strongly antiferromagnetically to weakly ferromagnetically coupled. Both …
Bis(Diethyldithiocarbamato)(Iodo)(4-Methoxyphenyl)Tellurium(Iv), P-Meoc6H4Te(Et2Ncs2)2I, And Its Isomorphous Partially Bromine-Replaced Analogue, P-Meoc6H4Te(Et2Ncs2)2Br0.41I0.59, Steinar Husebye, Steffen Kudis, Sergey V. Lindeman
Bis(Diethyldithiocarbamato)(Iodo)(4-Methoxyphenyl)Tellurium(Iv), P-Meoc6H4Te(Et2Ncs2)2I, And Its Isomorphous Partially Bromine-Replaced Analogue, P-Meoc6H4Te(Et2Ncs2)2Br0.41I0.59, Steinar Husebye, Steffen Kudis, Sergey V. Lindeman
Chemistry Faculty Research and Publications
No abstract provided.
Bromobis(Dimethyldithiocarbamato)(4-Methoxyphenyl)Tellurium(Iv) Dichloromethane Hemisolvate, P-Meoc6H4Te(Me2Ncs2)2Br.0.5ch2Cl2, Steinar Husebye, Steffen Kudis, Sergey V. Lindeman
Bromobis(Dimethyldithiocarbamato)(4-Methoxyphenyl)Tellurium(Iv) Dichloromethane Hemisolvate, P-Meoc6H4Te(Me2Ncs2)2Br.0.5ch2Cl2, Steinar Husebye, Steffen Kudis, Sergey V. Lindeman
Chemistry Faculty Research and Publications
The structure of the title TeIV complex, C13H19BrN2OS4Te.045(CH2Cl2), is pentagonal bipyramidal with four S atoms [Te-S 2.623 (1)-2.717 (1) Å] and the Br atom [Te-Br 2.890 (1) Å] in equatorial positions. The p-methoxyphenyl group is axial [Te-C 2.145 (3) Å] and the second axial position seems to be occupied by a dithiocarbamate group of a neighbouring molecule acting as a -ligand [TeC 3.751 (3) Å, C-TeC 170.2 (1)°], so that molecules are joined into centrosymmetric associations by this secondary coordination.
Bromobis(Diethyldithiocarbamato)(4-Methoxyphenyl)Tellurium(Iv), Steinar Husebye, Thoralf Engebretsen, Martin D. Rudd, Sergey V. Lindeman
Bromobis(Diethyldithiocarbamato)(4-Methoxyphenyl)Tellurium(Iv), Steinar Husebye, Thoralf Engebretsen, Martin D. Rudd, Sergey V. Lindeman
Chemistry Faculty Research and Publications
The crystals of the TeIV complex p-CH3OC6H4Te(Et2NCS2)2Br are isomorphous with those of the the iodine and mixed iodine/bromine analogues previously investigated. The structure is pentagonal bipyramidal at the Te atom with four S atoms [Te-S 2.618-2.721 (1) Å] and the Br atom [Te-Br 2.943 (1) Å] in equatorial positions. The p-methoxyphenyl group is axial [Te-C 2.147 (3) Å]. The second axial position is approached by a Br atom of a centrosymmetrically related complex [TeBr 3.423 (1) Å, C-TeBr 173.1 (1)°] so that the molecules are …
Tris(Diethyldithiocarbamato)(4-Methoxyphenyl)Tellurium(Iv), P-Meoc6H4Te(S2Cnet2)3, And The Triclinic Modification Of Tris(Diethyldithiocarbamato)Phenyltellurium(Iv), Phte(S2Cnet2)3, Steinar Husebye, Sergey V. Lindeman
Tris(Diethyldithiocarbamato)(4-Methoxyphenyl)Tellurium(Iv), P-Meoc6H4Te(S2Cnet2)3, And The Triclinic Modification Of Tris(Diethyldithiocarbamato)Phenyltellurium(Iv), Phte(S2Cnet2)3, Steinar Husebye, Sergey V. Lindeman
Chemistry Faculty Research and Publications
No abstract provided.
Benz[4,5]Isoquino[1,2-B]Quinazoline-7,9-Dione And A Rearrangement Product Of Its Hydrolysis, 2-(1,8-Naphthalenedicarboximido)Benzamide, Sergey V. Lindeman, Igor I. Ponomarev, Alexandr L. Rusanov
Benz[4,5]Isoquino[1,2-B]Quinazoline-7,9-Dione And A Rearrangement Product Of Its Hydrolysis, 2-(1,8-Naphthalenedicarboximido)Benzamide, Sergey V. Lindeman, Igor I. Ponomarev, Alexandr L. Rusanov
Chemistry Faculty Research and Publications
No abstract provided.
Cis-(Diethyldithiocarbamato)Diiodo(Phenyl)Tellurium(Iv), Phte(S2Cnet2)I2, And Its Methoxy-Substituted Mixed Br/1 Analogue Cis-Bis(0.4-Bromo/0.6-Iodo)-(Diethyldithiocarbamato)(4-Methoxyphenyl) Tellurium(Iv), P-Meoc6H4Te(S2 Cnet2)(Br0.4I0.6)2, Steinar Husebye, Steffen Kudis, Sergey V. Lindeman, Peter Strauch
Cis-(Diethyldithiocarbamato)Diiodo(Phenyl)Tellurium(Iv), Phte(S2Cnet2)I2, And Its Methoxy-Substituted Mixed Br/1 Analogue Cis-Bis(0.4-Bromo/0.6-Iodo)-(Diethyldithiocarbamato)(4-Methoxyphenyl) Tellurium(Iv), P-Meoc6H4Te(S2 Cnet2)(Br0.4I0.6)2, Steinar Husebye, Steffen Kudis, Sergey V. Lindeman, Peter Strauch
Chemistry Faculty Research and Publications
The TeIV complexes PhTe(S2CNEt2)I2, (1), and p-MeOC6H4Te(S2CNEt2)Br0.4/I0.6) 2, (2), have been synthesized by reacting PhTeI3 with NaS2CNEt2, and p-MeOC6H4Te(S2CNEt2)2I with Br2, respectively. In (2), both I atoms are partially replaced by Br atoms in a 3:2 ratio. The structures display distorted octahedral Te coordination with two symmetrically coordinated S atoms [Te—S 2.550 (2)—2.569 (2) Å in three independent molecules of (1) and 2.523 …
Cis-6-Methoxycarbonyl-2,10-Dioxa-1-Phosphabicyclo[4.4.0]Decane 1-Oxide, Thomas M. Lane, Oscar P Rodriguez, Anthony Gerard Sommese, Sheldon E. Cremer, Dennis W. Bennett
Cis-6-Methoxycarbonyl-2,10-Dioxa-1-Phosphabicyclo[4.4.0]Decane 1-Oxide, Thomas M. Lane, Oscar P Rodriguez, Anthony Gerard Sommese, Sheldon E. Cremer, Dennis W. Bennett
Chemistry Faculty Research and Publications
The crystal structure of the title compound, C9H1505P, is described. The molecule consists of two cis-fused six-membered rings, both in the chair conformation..
An M-Carboranedicarboxylic Acid Dianilide, Sergey V. Lindeman, Georgii A. Kats, Lyudmila G. Komarova
An M-Carboranedicarboxylic Acid Dianilide, Sergey V. Lindeman, Georgii A. Kats, Lyudmila G. Komarova
Chemistry Faculty Research and Publications
The crystal structure of the 'non hydrogen-bonded' (according to IR data) polymorph of 1,7-bis(phenylcarbamoyl)-1,7-dicarba-closo-dodecaborane(12), C16-H22B10N2O2, has been determined. The two phenylamide groups have a Z configuration [the torsion angles 0-C-N-C are -2.3 (5) and -3.0 (5)°]. As a result both 'active' protons of these groups are almost completely shielded by other H atoms of the neighbouring carborane nucleus and phenyl substituents, and, therefore, no hydrogen-bonding contacts are found.
N1-Acetyl-3'-Methylandrosta-4,16-Dieno[16,17-D]Pyrazole-3-One, Sergey V. Lindeman, Alexandr I. Yanovsky, Ezequiel Huipe Nava, Alexey V. Kamernitzky, Alina V. Skorova, Irina V. Vesela
N1-Acetyl-3'-Methylandrosta-4,16-Dieno[16,17-D]Pyrazole-3-One, Sergey V. Lindeman, Alexandr I. Yanovsky, Ezequiel Huipe Nava, Alexey V. Kamernitzky, Alina V. Skorova, Irina V. Vesela
Chemistry Faculty Research and Publications
In an attempt to find the structural features promoting the thermal isomerization of the N-acylated steroid [16,17-d]pyrazoles into [17,16-c]pyrazole derivatives,the X-ray structure analysis of the title compound, C23H30N2O3, (1), has been carried out. The steroid moiety of (I) has the usual conformation. The dihedral angle between the planar pyrazole ring and the N-acetyl group is very small [5.6 (2)°], but the amide C-N bond seems to be substantially elongated [1.404 (3) Å ]. The d-pyrazole ring junction via a double bond leads to deformations of …
5-Acetyl[2.2]Paracyclophane, Sergey V. Lindeman, Yuri T. Struchkov, Vyacheslav N. Guryshev
5-Acetyl[2.2]Paracyclophane, Sergey V. Lindeman, Yuri T. Struchkov, Vyacheslav N. Guryshev
Chemistry Faculty Research and Publications
The title compound 5-acetyltricyclo[8.2.2.24,7]hexa-deca-4,6,10,12,13,15-hexaene, C18H18O,is the first example of a mono-π-substituted [2.2]paracyclophane to be structurally characterized. The average bending angles are α = 13.2 and β = 9.9°. The distance between the 'bottoms' of the practically parallel boat-like benzene nuclei is 3.098(2) Å. The π conjugation between the acetyl group and the substituted benzene cycle is negligible (rotation angle ca 45°) because of steric hindrance.
Β-Homopipitzolone, Ezequiel Huipe Nava, V. A. Igonin, Sergey V. Lindeman, Yuri T. Struchkov, V. Mendoza, G. Garcia, J. A. Guzman
Β-Homopipitzolone, Ezequiel Huipe Nava, V. A. Igonin, Sergey V. Lindeman, Yuri T. Struchkov, V. Mendoza, G. Garcia, J. A. Guzman
Chemistry Faculty Research and Publications
The structure of β-homopipitzolone (one of the two isomers of an intermediate product in the homocedrole synthesis) has been unequivocally established as 1 O-hydroxy-2,6,9-trimetbyltricyclo[6.3.1.01,6] dodeca-9-ene-5, II, 12-trione with relative IR,2R,6R,8S configuration.
Structure Of 2-Methyl-5,6,7-Triphenyl-6,7-Dihydropyrazolo[2,3-A]Pyrimidine, Sergey V. Lindeman, Yuri T. Struchkov, O. V. Shishkin, S. M. Desenko, V. V. Lipson, V. D. Orlov
Structure Of 2-Methyl-5,6,7-Triphenyl-6,7-Dihydropyrazolo[2,3-A]Pyrimidine, Sergey V. Lindeman, Yuri T. Struchkov, O. V. Shishkin, S. M. Desenko, V. V. Lipson, V. D. Orlov
Chemistry Faculty Research and Publications
C25H21N3, Mr = 363.46, monoclinic, P21/n, a = 9.245 (2), b = 23.502 (5), c = 9.340 (2) Å, β= 103.50(3)°, V=1973.3(2) Å3, Z=4, Dx= 1.220 (2) g cm-3, λ (Mo Kα )= 0.71069 Å, μ = 0.068 cm-1, F(000) = 768, T= 292 K, R = 0.091 for 1442 unique observed reflections. The dihydropyrimidine ring adopts a distorted sofa conformation. The aryl substituents on the saturated C atoms have an axial orientation.
Structure Of 3-(3,5-Dimethylpiperidino)-N-(P-Chlorophenyl)Succinimide, V. A. Igonin, Sergey V. Lindeman, Yuri T. Struchkov, Ezequiel Huipe Nava, V. Mendoza
Structure Of 3-(3,5-Dimethylpiperidino)-N-(P-Chlorophenyl)Succinimide, V. A. Igonin, Sergey V. Lindeman, Yuri T. Struchkov, Ezequiel Huipe Nava, V. Mendoza
Chemistry Faculty Research and Publications
In the title molecule, 3-(3,5-dimethylpiperidino )-1-(4-chlorophenyl)-2,5-pyrrolidinedione (1), the N-(p-chlorophenyl) substituent is rotated by 68.8° relative to the succinimide plane. The piperidinyl ring has a chair conformation with all substituents in equatorial positions; the conformation around the piperidino-succinimide C--N bond is staggered.
Structure Of (22S)-3Β-Acetoxy-20-(3-Isopropylisoxazolin-5-Yl)-4,4,14 Α-Trimethylpregn-8(9)-Ene, Sergey V. Lindeman, Mikael S. Alexanyan, Yuri T. Struchkov, Rajesh Kumar Thaper, Irina G. Reshetova, Alexey V. Kamernitzky
Structure Of (22S)-3Β-Acetoxy-20-(3-Isopropylisoxazolin-5-Yl)-4,4,14 Α-Trimethylpregn-8(9)-Ene, Sergey V. Lindeman, Mikael S. Alexanyan, Yuri T. Struchkov, Rajesh Kumar Thaper, Irina G. Reshetova, Alexey V. Kamernitzky
Chemistry Faculty Research and Publications
C32H51NO3, Mr = 497·7, orthorhombic, P212121, a = 7·577 (2), b = 10·510 (2), c = 35·399 (7) Å, V = 2819 (1) Å3, Z = 4, Dx = 1·173 g cm-3, λ (Mo Kα) = 0·71073 Å, μ = 0·69 cm-1, F(000) = 1096, T = 153 K, R = 0·0497 for 2235 observed reflections. The compound investigated is found to be a (22S)-epimer.