一系列具有两个不对称双齿β-烯氨基酮(N,O)配体(4b - t),[RN═C(CF 3)CHC(t -Bu)O] 2 TiCl 2(4b,R =- C 6 H 4 F(o); 4c,R = -C 6 H 4 F(m); 4d,R = -C 6 H 4 F(p); 4e,R = -C 6 H 3 F 2(2 ,3); 4f,R = −C 6H 3 F 2(2,4);4g,R = -C 6 H 3 F 2(2,5);m=1。4h,R = -C 6 H 3 F 2(2,6);m=1。4i,R = -C 6 H 3 F 2(3,4);m=1。4j,R = -C 6 H 3 F 2(3,5);m=1。4k,R = -C 6 H 2 F 3(2,3,4);4l,R = -C 6 H 2 F 3(3,4,5); 4m,R = -C 6 H 4 CF 3(o);4n,R = -C 6 H 4 CF 3(m);m=1。4o,R