) [where P-P = bma (2a), bpcd (2b)] have been prepared by separate routes (mild thermolysis and Me3NO activation) and studied for their conversion to CoRu(CO)4(mu-P-P)(mu-PPh2). The penta- and tetracarbonyl complexes have been isolated and fully characterized in solution by IR and NMR spectroscopy. The kinetics for the conversion of 2a-->3a and of 2b-->3b were measured by IR spectroscopy in chlorobenzene
在二
膦配体2,3-双(
二苯基膦基)
马来酸酐(bma)和4,5-双(
二苯基膦基)存在下,在回流的
1,2-二氯乙烷中加热CoRu(CO)7(mu-PPh2)(1) )-
4-环戊烯-1,3-二酮(bpcd)提供了新的混合
金属配合物CoRu(CO)4(mu-PP)(mu-PPh2)[其中PP = bma(3a),bpcd(3b)]以及痕量已知的复杂CoRu(CO)6(PPh3)(mu-PPh2)(4)。必要的五羰基中间体CoRu(CO)5(mu-PP)(mu-PPh2)[其中PP = bma(2a),bpcd(2b)]已通过单独的途径(温和热解和Me3NO活化)制备,并对其进行了研究。转化为CoRu(CO)4(mu-PP)(mu-PPh2)。已分离出五羰基和四羰基配合物,并在溶液中通过IR和NMR光谱进行了全面表征。2a-> 3a和2b->转化的动力学 通过IR光谱在
氯苯溶剂中测量3b。根据一阶速率常数,CO抑制和激活参数(2a->