Molybdenum tricarbonyl complexes of tricyclic trisaminomethane derivatives; synthesis and structural studies
作者:Steven P. Van Kouwenberg、Edward H. Wong、Gary R. Weisman、Eric J. Gabe、Florence L. Lee、Pete Jackson
DOI:10.1016/s0277-5387(00)80293-4
日期:1989.1
Reactions of the trisaminomethanes, 1 (R = H) and 2 (R = Me), with cycloheptatrienyl molybdenum tricarbonyl afforded their respective molybdenum tricarbonyl complexes; 3 and 4. Structures of these products have been determined by X-ray diffraction studies. Complex 3 crystallizes in the monoclinic space group P21/m with a = 7.7364(6), b = 12.505(1), c = 7.774(1) Å, β = 107.70(1)°, Z = 2, μ(Mo-Kα) =
三氨基甲烷1(R = H)和2(R = Me)与环庚三烯基三羰基钼的反应得到它们各自的三羰基钼配合物。3和4。这些产品的结构已通过X射线衍射研究确定。复杂3个单斜空间群结晶P 2 1 /米与一个= 7.7364(6),b = 12.505(1),C ^ = 7.774(1),β= 107.70(1)°,Ž = 2,μ(钼ķ α)=0.90毫米-1。它的钼配位球具有57.7(1)–58.0(1)°的异常小的配体咬合角(NMoN)。没有找到独特的桥头甲硫基氢,但是它的存在已通过IR和固态NMR光谱法确认。复杂4个结晶的斜方晶系空间群Pcmn与一个= 7.7537(2),b = 12.3176(4),C ^ = 15.6563(7),Ž = 4,μ(钼ķ α)=0.87毫米-1。类似地,观察到58.8(1)°的夹挤NMON角。明显地,相对于游离配体值,甲基至桥头碳键缩短了0.04,这与络合时负超共轭的减少相一致。