by crystallization. With increased reaction time, only the expected mononuclear complexes of the type [NHCAuC≡CR] are produced. The crystal structure of [(NHC)2Au]2[(PhC2)2Au]PF6 reveals an unprecedented triple-decker array upheld by a remarkably short (2.9375(7) Å) unsupported Au···Au···Au contact. The mononuclear complex [NHCAuC≡CPh] was found to crystallize as three distinct polymorphs and a pseudopolymorph
NHC·HX(NHC =
1-苄基-3-甲基苯并
咪唑-2-基,X = Br –,PF 6 –)和(AuC≡CR)n(R = Ph,C 3 H 6 OH)的反应首先,由Cs 2 CO 3制备的通式为[(NHC)2 Au] 2 [(RC 2)2 Au] X的化合物可以通过结晶分离。随着反应时间的增加,仅产生预期的[NHCAuC≡CR]类型的单核复合物。[(NHC)2 Au] 2 [(PhC 2)2 Au] PF 6的晶体结构揭示了一个空前的三层阵列,由非常短的(2.9375(7)Å)无支撑的Au···Au···Au接触支撑。发现单核络合物[NHCAuC≡CPh]结晶为三个不同的多晶型物和假多晶型物,这取决于分子间的Au···Au距离发出蓝色,绿色或黄色的光。两种合成方法用于制备一系列由双核NHC连接的通式[NHC-(CH 2)n -NHC(AuC≡CR)2 ]的Au(I)炔基配合物,其中NHC