[Mo2Cp2(μ-SMe)3μ-η1-NC(CH3)CH2CN}] (3), which potentially offer the alternatives of S- or N-methylation, reacted with methylating agents to give mainly the S-methylated derivatives 5 and 7. Only in the case of the nucleophilic reactant 2 was N-methylation also observed and isomer 6 was obtained as a minor product together with 5. New complexes have been completely characterised by multinuclear NMR
在甲基化的尝试顺- [沫2的Cp 2(μ-SME)3大号2 ](BF 4)的[Cp =η 5 -C 5 H ^ 5 ; L = CO(1A)CNxyl(1B),CNBu吨(1C),NCMe(1D)]与三
氟甲磺酸甲酯,得到相应的
硫醚桥的阳离子[沫2的Cp 2(μ-SME)2(μ-SMe的2)L- 2 ] 2+(4 2+),但1a除外在室温下不反应。因此,辅助
配体L的电子性质对该反应的过程具有至关重要的影响。二聚体化合物[沫2的Cp 2(μ-SME)3(CNBu吨)(CN)](2)和[沫2的Cp 2(μ-SME)3 μ-η 1 -NC(CH 3)CH 2 CN}](3),其可能提供S-或N-甲基化的替代方案,其与甲基化剂反应以主要得到S-甲基化的衍
生物5和7。仅在亲核反应物2的情况下还观察到N-甲基化,得到异构体6和5的副产物。新的配合物已通过多核NMR,IR和元素分析得到了完全表征,并通过在100