The co-ordination chemistry of electron-rich poly(organosulphur) compounds. Part 1. Chromium(<scp>0</scp>), molybdenum(<scp>0</scp>), and tungsten(<scp>0</scp>) complexes having tetrakis(thioalkyl)olefins as two- or four-electron donors: the crystal and molecular structure of tetracarbonyl[tetrakis(methylthio)ethene-SS″]chromium
作者:Michael F. Lappert、David B. Shaw、George M. McLaughlin
DOI:10.1039/dt9790000427
日期:——
Treatment of [Cr(CO)6] with C2(SR)4(LSR2) under photolysis in tetrahydrofuran affords cis-[M(CO)4(LSR2)](9; M = Cr, R = Me); analogues (9; M = Cr, Mo, or W; R = Et) have been obtained in better yield from the appropriate hexacarbonyl and C2(SEt)4 in EtOH in the presence of Na[BH4]. In contrast, the olefin (:[graphic omitted])2 and [Cr(CO)6] gave [Cr(CO)5[graphic omitted][graphic omitted]}], which
在四氢呋喃中用光解法用C 2(SR)4(L SR 2)处理[Cr(CO)6 ],得到顺式-[M(CO)4(L SR 2)](9; M = Cr,R = Me ); 在Na [BH 4 ]存在下,由适当的六羰基和C 2(SEt)4在EtOH中的较好收率得到类似物(9; M = Cr,Mo或W; R = Et)。相反,烯烃(:[省略图示] [Cr(CO)6)2和[Cr(CO)5提供[Cr省略] [Graphic省略]}的[Cr(CO)5 ]在加热时转变为烯烃和[Cr (CO)6]; 在[OEt 3 ] [BF 4 ]的存在下,可以从[NEt 4 ] [Cr(CO)5 Cl]和烯烃获得相关的络合物[Cr(CO)5 C 2(SEt)4 } ],但是Mo或W的类似物不稳定,产生复杂的化合物(9)。通过用C 2(SEt)4和PPh 3连续处理,由[M(CO)3(NCMe)3 ]制备了复合物fac- [M(CO)3(PPh