the carbene ligand. For comparison, the dihydrogen ReI dibromide complexes [Re(Br)2(NO)(PR3)2(η2‐H2)] (R=Cy 2 a, iPr 2 b) were reacted with allyl‐ or benzylbromide, thereby affording the monophosphine ReII complex salts [R3PCH2R′][Re(Br)4(NO)(PR3)] (R′=CHCH2 6, Ph 7). The reduction of ReII complexes has also been examined. Complex 3 a or 3 b can be reduced by zinc to afford 1 a or 1 b in high yield
五个配位的Re I
氢化物络合物[Re(Br)(H)(NO)(PR 3)2 ](R = Cy 1 a,i Pr 1 b)与苄基
溴反应,得到17电子单核Re II
氢化物络合物[Re(Br)2(H)(NO)(PR 3)2 ](R = Cy 3 a,i Pr 3b),其特征在于EPR,循环伏安法和磁化率测量。在
二溴甲烷或
溴仿的情况下,除Re之外,1的反应还生成Re II
氢化物3我卡宾
氢化物[回复(CHR 1)(BR)(H)(NO)(PR 3)2 ](R 1 = H 4,
溴5 ; R =赛扬一个,我
镨b),其中
氢化物配位体是顺位定位于卡宾
配体。为了比较,再二氢我二
溴化物配合物[回复(BR)2(NO)(PR 3)2(η 2 -H 2)](R =赛扬2,我
镨2 B)用烯丙基-苄基
溴或反应,从而获得单膦ReII络合物盐[R 3 PCH 2 R'] [回复(BR)4(NO)(PR 3)](R'= CHCH