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Syntheses and Crystal Structures of Novel Ternary Alkali Metal Gold Acetylides M I AuC 2 (M I = Li, Na, K, Rb, Cs)
Author(s) -
Offermanns J.,
Ruschewitz U.,
Kneip C.
Publication year - 2000
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/(sici)1521-3749(200003)626:3<649::aid-zaac649>3.0.co;2-h
Subject(s) - chemistry , alkali metal , crystallography , crystal structure , ternary operation , pyridine , tetragonal crystal system , metal , liquid ammonia , stereochemistry , ammonia , medicinal chemistry , organic chemistry , computer science , programming language
By the reaction of AuI with alkali metal hydrogen acetylides M I C 2 H (M I = Li–Cs) in liquid ammonia and subsequent heating of the remaining residue in refluxing pyridine (M I = Li, Na, K) or as a solid phase at about 110 °C in vacuum (M I = Rb, Cs) ternary alkali metal gold acetylides M I AuC 2 were obtained. Their crystal structures were investigated by the means of X‐ray powder diffraction. $^1_\infty$ [Au(C 2 ) 2/2 – ] chains are the characteristic structural motif which are packed in a hexagonal (LiAgC 2 ) and tetragonal arrangement (NaAuC 2 –CsAuC 2 ), respectively. Simple calculations based on the close packing of rods and spheres can explain these different arrangements. The existence of C–C triple bonds in the title compounds is confirmed by Raman spectroscopic investigations.