DIAZAPHOSPHOLE CARBONYL-COMPLEXES OF GROUP-VIB METALS

Reactions of group VI B metal carbonyls with cis_and trans3,4-dihydro-2,3,4,5-1etrapheny1-2H-I,2,3-diazaphospho1e (DAP) have yielded the corresponding new derivatives (CO)M(DAP) in which the ligand is bonded through the phosphorus atom. On heating (CO) Mo(, cis-DAP) in n-octane with additional cis, -DAP formation of a, cis-trans mixture of disubstituted tetracarbony1s (CO).Mo(cis-DAP)_ occurs.Under the 4 - 2 same conditions (CO) Mo (trans-DAP) and trans-DAP afford only trans - (CO)Mo(trans-DAP). The nature of DAP to metal bonding could be ascertained from ir, H nmr and mass Spectral analyses. © 1979, Taylor & Francis Group, LLC. All rights reserved.