Group VIIB Manganese and Rhenium

QUINN AND J. H. TSAI V. Group VIIB Manganese and Rhenium 

In the course of a study on the insertion of olefins into metal-metal bonds, Clark et al. (115) have obtained, as a yellow oil, an ethylene Tt complex (CH3)3Sn-Mn(CO)4(C2H4) (42), by UV irradiation of (CH3)3Sn-Mn(CO)5 under ethylene pressure. Although the NMR spec- 

The analogous reaction of ethylene at 250 atm with Rc(CO)jCl affords the complex ion [(C2H4)2Re(CO)4]+ (209) for which structure (44) having the olefinic ligands in cis positions has been postulated. 

Acryloniti ile reacts witli (C r,H,r,)Mn(00) , in hexane under UV irradiation to give stable, yellow crystals of ((JH CH( N)Mn(CO)o(C2H5), the s])cctra of w hich unambiguously suggest coordination of the C=C double bond (OSl). I he same reaction occurs with 1,3-butadiene 631) 

The direct substitution of the carbonyl groups in Mn2(CO)]o by 1,3-biitadiene affords only 1 , of orange, crystalline (C4H j)Mn2(CO)n with cisoid configuration (47) 630). Reaction of butadiene with 

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