REACTIONS OF SIGMA-DERIVATIVES OF TRIVALENT TITANIUM AND VANADIUM WITH KETONES

The interaction of Ph(3)Ti with a number of ketones (acetone, 2-butano ne, 3,3-dimethyl-2-butanone, benzophenone) was studied. The PhTi(OCR(1 )R(2)Ph)(2) complexes, where R(1)=R(2)=Me (a), R(1)=Me, R(2)=Et (b), R (1)=Me, R(2)=t-Bu (c), and R(1) R(2)=Ph (d) were isolated in satisfact ory yields. These compounds were characterized by ESR and IR spectrosc opy and elemental analysis. Their thermal stability was determined by the DTA method. The reaction of Bn(3)V with acetone gives V(OCMe(2)Bn) (3). In analogy with titanium compounds, Bn(4)V reacts with acetone at the ratio 1 : 2 to give Bn(2)(OCMe(2)Bn)(2).