Substitution of THF by diorganylmethylthiboranes in (CO)5Cr · THF yields the rather unstable complexes (CO)5Cr · CH3SBR2 (R = CH3, C6H5). In contrast to the σ-thiophene complex (CO)5Cr · SC4H4 the pentacarbonylchromium complex of the σ-S-bonded 2-diethylboryl-5-methylthiopene is quite stable due to interaction of the boryl group with CO ligands.
在(CO)5 Cr· THF中用二有机基甲基
噻喃酮取代THF会生成相当不稳定的络合物(CO)5 Cr·CH 3 SBR 2(R = CH 3,C 6 H 5)。与σ-
噻吩配合物(CO)5 Cr·SC 4 H 4相比,由于
硼基与CO
配体的相互作用,σ-S键合的2-
二乙基硼基-5-甲基
噻吩的五羰基
铬配合物非常稳定。