perpendicular to the Co–Co bond. Further thermolysis of complexes 2 produces [Co2(µ-PPh2CRCR′)(µ-PPh2)(CO)4]3(R = R′= CO2Me 3a or Ph 3b and [Co2µ-PPh2CRCR′C(O)}(µ-PPh2)(CO)4]4c(R = H, R′= Ph). The structure of 4c has been determined by X-ray analysis. The PPh2CHCPhC(O) ligand forms a five-membered metallacyclic ring incorporating one Co atom and is π-bonded to the other Co atom. Complexes 3a and 3b are partially
P 2 Ph 4与多种取代的
炔烃配合物[Co 2(µ-RC CR')(CO)6 ]在
甲苯中的反
应得到配合物[Co 2(µ-RC CR')(CO)5(P 2 Ph 4)] 1(R = R'= CO 2 Me 1a或Ph 1b ; R = Ph,R'= H 1c和[Co 2(µ-RC CR')(µ-P 2 Ph 4)(CO )4 ] 2(R = R'= Ph 2b ; R = Ph,R'= H 2c。在热解过程中,类型1的所有三个衍
生物都干净地转化为2。对2a的X射线衍射研究表明,方形的Co 2 P 2核芯具有垂直于Co-Co键的对称
炔烃。配合物2进一步热解生成[Co 2(µ-PPh 2 CRCR')(µ-PPh 2)(CO)4 ] 3(R = R'= CO 2 Me 3a或Ph 3b和[Co 2 µ-PPh 2 CRCR'C(O)}(µ-PPh 2)(CO)4 ] 4c(R = H,R′=