Crystal structures of tri-chlorido-(4-methyl-piperidine)gold(III) and two polymorphs of tri-bromido(4-methyl-piperidine)-gold(III).
Acta Crystallogr E Crystallogr Commun
; 80(Pt 5): 476-480, 2024 Apr 01.
Article
em En
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| ID: mdl-38721430
ABSTRACT
Tri-chlorido-(4-methyl-piperidine)-gold(III), [AuCl3(C6H13N)], 1, crystallizes in Pbca with Z = 8. Tri-bromido-(4-methyl-piperidine)-gold(III), [AuBr3(C6H13N)], 2, crystallizes as two polymorphs, 2a in Pnma with Z = 4 (imposed mirror symmetry) and 2b, which is isotypic to 1. The Au-N bonds trans to Cl are somewhat shorter than those trans to Br, and the Au-Cl bonds trans to N are longer than those cis to N, whereas the Au-Br bonds trans to N are slightly shorter than the cis bonds. The methyl and AuX 3 groups (X = halogen) occupy equatorial positions at the six-membered ring. The packing of all three structures involves chains of mol-ecules with offset stacking of the AuX 3 moieties associated with short Auâ¯X contacts; for 1 and 2b these are reinforced by N-Hâ¯X hydrogen bonds, whereas for 2a there are no classical hydrogen bonds and the chains are inter-connected by Brâ¯Br contacts.
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Ano de publicação:
2024
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Article