prepared. Their IR and NMR spectra have been studied, and the C-H out-of-plane bending vibrations and the 1H chemical shifts of the π-cyclopentadienyl group found to show a linear correlation with the Taft“σ”*-constants of R in (I) and with the Hammett σ-constants of X in (II).
通式π-C的复合物5 ħ 5的Ni [P(NC 4 9)3 ] SR(I)(其中R是H,CH 3,C 2 H ^ 5,NC 3 ħ 7,NC 4 ħ 9,CH 2 ç 6 ħ 5,CH 2 COOH,和COCH 3)和π-C 5 H ^ 5的Ni [p(NC 4 H ^ 9)3 ] SC 6 H ^ 4 X(II)(其中X是H,p -CH 3,p -Cl,p -COCH 3,和p -NO 2)已经被制备。研究了它们的IR和NMR光谱,发现CH面外弯曲振动和π-
环戊二烯基的1 H
化学位移与R在( I)和(II)中X的哈米特σ常数。