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Full-Text Articles in Physical Sciences and Mathematics
Octa-N-Butyl-1kappac,2kappac,3kappac,4kappac-Tetra-Kis(Mu-2-Hydroxy-Benzoato)-1:2 Kappao:O;2:3kappao:O';3:4kappao:O;1:4kappao:O'-Di-Mu(3)-Oxido-1:2:3kappao:O:O;1:3 :4kappao:O:O-Tetra-Tin(Iv), M Misran
Misni Misran
In the centrosymmetric tetra-nuclear title compound, [Sn4(C4H9)8(C7H5O3) 4O2], one of the two independent Sn atoms is five-coordinate in a cis-C2SnO3 trigonal-bipyramidal geometry [C - Sn - C = 142.7 (1)°]; the geometry is distorted owing to a long Sn⋯O(double bond) inter-action [Sn⋯O = 2.862 (1) Å]. The other Sn atom has a bent R 2Sn skeleton [C - Sn - C = 144.0 (1)°], but the geometry is best regarded as being a trans-C2SnO4 octa-hedron as the Sn-O(single bond) inter-action is shorter [Sn - O = 2.674 (1) Å].
A Polymorph Of K₄Ge₄Se₁₀, Amitava Choudhury, Sabine Strobel, Peter K. Dorhout
A Polymorph Of K₄Ge₄Se₁₀, Amitava Choudhury, Sabine Strobel, Peter K. Dorhout
Chemistry Faculty Research & Creative Works
A new monoclinic polymorph, ?-K4Ge4Se10 (tetra-potassium deca-selenidotetra-germanate), that crystallizes in space group P21/c has been isolated. The structure contains isolated super-tetra-hedral adamantane [Ge4Se10]4- clusters identical to those in the known K4Ge4Se10 polymorph (P21/m), held together in in the crystal structure by ionic inter-action with the K+ ions. The adamantane unit, [Ge4Se10] 4-, is formed by corner-sharing of four GeSe4 tetra-hedra, with average Ge -. Se distances of 2.378 and 2.281 Å for (Ge - Se)endo and (Ge - Se)exo, respectively. There are four crystallographically distinct K + ions in ?-K4Ge4Se10 having coordination numbers of 5, 7. and …