Hexacarbonyltitanate(2-) reacts with azobenzene to provide 40-65% yields of [Ti(PhNNPh)(CO)4]2-, which is formulated as a 1,2-diphenylhydrazido dianion adduct of zerovalent titanium tetracarbonyl. The latter undergoes very facile hydrolysis to provide 1,2-diphenylhydrazine and the first hydroxo-carbonyl of titanium [Ti2(μ-OH)2(CO)8]2-, which has been structurally characterized as the [K(18-crown-6)]+ salt.
Bibliographical noteFunding Information:
The authors wish to thank the US National Science Foundation and the donors of the Petroleum Research Fund administered by the American Chemical Society for financial support and the Scuola Normale Superiore, Pisa, Italy, and the Petroleum Research Fund for fellowships to G.T. We also thank Christine Lundby for her expert assistant with the manuscript and Professor Rinaldo Poli for his invitation to contribute to this volume.
- Hydroxo complexes