The chemistry of dinitrogen residues. Part 3. Hydrazido(2–)-derivatives of titanium(IV). X-Ray crystal structure of [{Ti(C5H5)Cl(NNPh2)}2]

The preparations of 1,2-hydrazide(2–) and 1,1 -hydrazide(2–) complexes of titanium(IV) are described. The 1H n.m.r. spectra of dinuclear 1,1 -disubstituted hydrazide(2–) complexes, such as [{Ti(C5H5)Cl(NNPh2)}2], are anomalous, but can be explained on the basis of an X-ray structure analysis which shows that one hydrazide forms a symmetrical bridge whereas the other is both bridging and bound side-on to one of the titaniums.