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Crystal structures of seven gold(III) complexes of the form L Au X 3 ( L = substituted pyridine, X = Cl or Br).

التفاصيل البيبلوغرافية
العنوان: Crystal structures of seven gold(III) complexes of the form L Au X 3 ( L = substituted pyridine, X = Cl or Br).
المؤلفون: Döring C; Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany., Jones PG; Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany.
المصدر: Acta crystallographica. Section E, Crystallographic communications [Acta Crystallogr E Crystallogr Commun] 2024 Jul 31; Vol. 80 (Pt 8), pp. 894-909. Date of Electronic Publication: 2024 Jul 31 (Print Publication: 2024).
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: John Wiley & Sons Ltd Country of Publication: England NLM ID: 101648987 Publication Model: eCollection Cited Medium: Print ISSN: 2056-9890 (Print) NLM ISO Abbreviation: Acta Crystallogr E Crystallogr Commun Subsets: PubMed not MEDLINE
أسماء مطبوعة: Original Publication: West Sussex : John Wiley & Sons Ltd. [2015]-
مستخلص: The structures of seven gold(III) halide derivatives of general formula L Au X 3 ( L = methyl-pyridines or di-methyl-pyridines, X = Cl or Br) are presented: tri-chlorido-(2-methyl-pyridine)-gold(III), [AuCl 3 (C 6 H 7 N)], 1 (as two polymorphs 1a and 1b ); tri-bromido-(2-methyl-pyridine)-gold(III), [AuBr 3 (C 6 H 7 N)], 2 ; tri-bromido-(3-methyl-pyridine)-gold(III), [AuBr 3 (C 6 H 7 N)], 3 ; tri-bromido-(2,4-di-meth-yl-pyridine)-gold(III), [AuBr 3 (C 7 H 9 N)], 4 ; tri-chlorido-(3,5-di-methylpyridine)-gold(III), [AuCl 3 (C 7 H 9 N)], 5 ; tri-bromido-(3,5-di-methyl-pyridine)-gold(III), [AuBr 3 (C 7 H 9 N)], 6 , and tri-chlorido-(2,6-di-methyl-pyridine)-gold(III), [AuCl 3 (C 7 H 9 N)], 7 . Additionally, the structure of 8 , the 1:1 adduct of 2 and 6 , [AuBr 3 (C 6 H 7 N)]·[AuBr 3 (C 7 H 9 N)], is included. All the structures crystallize solvent-free, and all have Z ' = 1 except for 5 and 7 , which display crystallographic twofold rotation symmetry, and 4 , which has Z ' = 2. 1a and 2 are isotypic. The coordination geometry at the gold(III) atoms is, as expected, square-planar. Four of the crystals ( 1a , 1b , 2 and 8 ) were non-merohedral twins, and these structures were refined using the 'HKLF 5' method. The largest inter-planar angles between the pyridine ring and the coordination plane are observed for those structures with a 2-methyl substituent of the pyridine ring. The Au-N bonds are consistently longer trans to Br (average 2.059 Å) than trans to Cl (average 2.036 Å). In the crystal packing, a frequent feature is the offset-stacked and approximately rectangular dimeric moiety (Au- X ) 2 , with anti-parallel Au- X bonds linked by Au⋯ X contacts at the vacant positions axial to the coordination plane. The dimers are connected by further secondary inter-actions (Au⋯ X or X ⋯ X contacts, 'weak' C-H⋯ X hydrogen bonds) to form chain, double chain ('ladder') or layer structures, and in several cases linked again in the third dimension. Only 1b and 7 contain no offset dimers; these structures instead involve C-H⋯Cl hydrogen bonds combined with Cl⋯Cl contacts ( 1b ) or Cl⋯π contacts ( 7 ). The packing patterns of seven further complexes L Au X 3 involving simple pyridines (taken from the Cambridge Structural Database) are compared with those of 1 - 8 .
(© Döring and Jones 2024.)
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فهرسة مساهمة: Keywords: coinage bonds; crystal structure; gold; halogen bonds; polymorphs; pyridine; twinning
تواريخ الأحداث: Date Created: 20240807 Latest Revision: 20240808
رمز التحديث: 20240808
مُعرف محوري في PubMed: PMC11299753
DOI: 10.1107/S2056989024007266
PMID: 39108791
قاعدة البيانات: MEDLINE
الوصف
تدمد:2056-9890
DOI:10.1107/S2056989024007266