Amine complexes of gold, part 10: gold(I) thiocyanate complexes with tetrahydrothiophene, dimethyl sulfide, ammonia, amines and azaaromatics

作者：Strey Mark; Doering Cindy; Jones Peter G^*

来源：Zeitschrift Fur Naturforschung Section B-a Journal of Chemical Sciences, 2018, 73(2): 125-147.

DOI：10.1515/znb-2017-0204

• amine
• aurophilic interactions
• gold
• thiocyanate

The reaction of (tht) AuCl (tht = tetrahydrothiophene) with KSCN leads to a mixture of gold(I) thiocyanate AuSCN and [(tht)(2)Au](+) [Au(SCN)(2)](-) 1. The compounds were separated and the X-ray structure of 1 confirmed as an alternating chain of anions and cations linked by aurophilic contacts. Either pure AuSCN or the mixture was used to synthesize further derivatives of AuSCN, all of which were investigated by X-ray methods. Most products were of limited stability when removed from their mother liquor. The dimethyl sulfide derivative 2 is molecular, (Me2S) AuSCN; the ammonia derivative 3 is ionic, [(NH3)(2)Au](+) [Au(SCN)(2)](-). The reaction with 2,2-bipyridyl leads (presumably by involvement of the solvent or of atmospheric moisture) to [bipy-H](+) [Au(SCN)(2)](-) 13. All other products involve amines or azaaromatics as ligands L. The primary amine tert-butylamine forms an ionic product [L2Au](+) (SCN)(-) 4. The secondary amines piperidine and dibenzylamine lead to molecular structures LAuSCN (5 and 6), whereas pyridine-based azaaromatics lead to ionic products [L2Au](+) [Au(SCN)(2)](-) with L = 2-, 3- or 4-picoline (7-9), 2,4-, 3,4- or 3,5-lutidine (10-12). The 3,4-lutidine derivative 11 forms two polymorphs that tend to form mixed crystals. The dominant features of the crystal packing for 7-12 are short aurophilic interactions.

• 出版日期2018-2