Tetramethylcyanoguanidine, NCNC(NMe2)2, reacts with pentacarbonyl-[methoxy(phenyl)carbene]chromium, (CO)5Cr[C(Ph)OMe], via substitution of the carbene ligand to give pentacarbonyl(tetramethylcyanoguanidine)chromium. X-ray structure analysis shows that the CrNCN fragment is nearly linear in the crystal, and that the CNC angle is 122.9(1)°. In solution rapid syn-anti isomerization at the NC double
四甲基
氰基
胍NCNC(NMe 2)2通过取代卡宾
配体与五羰基-[甲氧基(苯基)卡宾]
铬,(CO)5 Cr [C(Ph)OMe]反应生成五羰基(四甲基
氰基
胍))
铬。X射线结构分析表明,CrNCN片段在晶体中几乎是线性的,CNC角为122.9(1)°。在溶液中,在NC双键处发生快速的顺-反异构化。四甲基
氰基
胍与五羰基[乙酰氧基(苯基)卡宾]-
铬和-
钨的反应,(CO)5 M- [C(Ph)OCO(O)Me](M = Cr,W),产生(CO)5 M [C(PHNC(NMe 2)2],其中卡宾
配体的乙酰氧基被交换为
氰基
胍的NC(NMe 2)2基团。