Synthesis and Properties of Aryldicyclopentadienyltitanium(III) Compounds

The synthesis and properties of the compounds Cp2TiR, with R=C6H5, o-, m-, p-CH3C6H4, 2,6-(CH3)2C6H3, 2,4,6-(CH3)3C6H2, C6F5, CH2C6H5, are described. Chemical and physical properties indicate that the R groups are σ-bonded to the titanium atom. The complexes are monomeric, with one unpaired electron per titanium atom. They are very air sensitive, and vary markedly in thermal stability; some of the compounds react with molecular nitrogen, to give complexes of the general formula (Cp2TiR)2N2. Compounds Cp2TiR with R=alkyl could not be isolated.