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Full-Text Articles in Physical Sciences and Mathematics
Hydrogen-Bonding Networks In Heterocyclic Thioureas, Aakarsh Saxena, Robert D. Pike
Hydrogen-Bonding Networks In Heterocyclic Thioureas, Aakarsh Saxena, Robert D. Pike
Arts & Sciences Articles
The synthesis of heterocyclic thioureas from heterocyclic amines with phenyl- or methylisothiocyanate or CS2 is described. Seven new X-ray crystal structures are reported: In N-(3-pyridyl)-N′-phenylthiourea (Pna21, a = 10.1453(3), b = 17.6183(5), c = 6.4787(2), V = 1158.02(6), Z = 4) hydrogen-bonding results in formation of a 3D network consisting of helices, which form channels parallel to the c-axis. In N-(4-pyridyl)-N′-phenylthiourea (P21/c, a = 16.9314(3), b = 10.3554(2), c = 13.5152(3), β = 106.5080(10), V = 2271.96(8), Z = 4, two independent molecules) hydrogen-bonding results in N–H···S bridged dimers …
Monodromy And The Structure Of The Energy Spectrum Of Hydrogen In Near Perpendicular Electric And Magnetic Fields, Christopher Robert Schleif, John B. Delos
Monodromy And The Structure Of The Energy Spectrum Of Hydrogen In Near Perpendicular Electric And Magnetic Fields, Christopher Robert Schleif, John B. Delos
Arts & Sciences Articles
No abstract provided.
Threaded Structure And Blue Luminescence Of (Cucn)20(Piperazine)7, Robert D. Pike, Kathryn E. Dekrafft, Amanda N. Ley, Tristan A. Tronic
Threaded Structure And Blue Luminescence Of (Cucn)20(Piperazine)7, Robert D. Pike, Kathryn E. Dekrafft, Amanda N. Ley, Tristan A. Tronic
Arts & Sciences Articles
The structurally unique and highly luminescent 20 : 7 complex of CuCN with piperazine (Pip) was formed under aqueous conditions; its structure reveals two interpenetrated 2D sub-networks in 6 : 1 ratio: (CuCN)2(Pip) and (CuCN)8(Pip), the latter consisting of Cu18(CN)16(Pip)2 macrocycles.
1,2,3,4-TetraHydroQuinoxaline, Robert D. Pike, Emily C. Dugan
1,2,3,4-TetraHydroQuinoxaline, Robert D. Pike, Emily C. Dugan
Arts & Sciences Articles
The title compound, C8H10N2, was synthesized from the hydrogenation reaction of quinoxaline. The crystal structure reveals a puckered piperazine ring fused to a planar aromatic ring. A series of N-HN hydrogen bonds produces an infinite zigzag chain.
7,8-Dichloro-1,2,3,4-TetraHydroPhenazine, Cesar H. Zambrano, Robert D. Pike, Ricky J. Paul Gibson, Brittnay D. Barger, Eric E. Dueno
7,8-Dichloro-1,2,3,4-TetraHydroPhenazine, Cesar H. Zambrano, Robert D. Pike, Ricky J. Paul Gibson, Brittnay D. Barger, Eric E. Dueno
Arts & Sciences Articles
In the structure of the title compound, C12H10Cl2N2, the cyclohexene ring adopts a half-chair conformation.