Reaction of bis(methylzinc)-1,2-dipyridyl-1,2-bis(tert-butyldimethylsilylamido)ethane with triisopropylsilylphosphane and -arsane

The reaction of bis(methylzinc)-1,2-dipyridyl-1,2bis(tert-butyldimethylsily lamido)ethane (1) with triisopropylsilylphosphane gives the three-nuclear c omplex [1,2-dipyridyl-1,2-bis(tert-butyldimethylsilyl amido)e thane] trizin c-bis(mu -triisopropylsilylphosphanediide) (2). Two zinc atoms show the coo rdination number of four whereas the third metal center is located between the two phosphorus atoms with a bent P-Zn-P-moiety. The reaction of 1 with triisopropylsilylarsane proceeds analoguesly, however, we were not able to isolate analytically pure [1,2-dipyridyl-1,2-bis (tert-butyldimethylsilylam ido) ethane] trizinc-bis (mu -triisopropylsilylarsanediide) (3).