Oxovanadium(IV) complexes, [VO(J-R)], where H(2)J-R is a Jager-type li
gand with bridging group R (ethylene o-phenylene or 4-methyl-o-phenyle
ne), have been synthesized. Condensations of the complexes with diamin
es give products but as sticky, insoluble materials. An alternative me
thod has been used to obtain cyclic oxovanadium(IV) complexes.