Table 5: The electron correlation effect of α-t-Bu-ω-CN-poly(methylphenyl)silane (n = 2, 4, 6). All quantities are in a.u.

CPHFMP2MP2/CPHF

2
1.951.860.95
354.10376.091.06
77.2111.01.43
4
2.001.910.96
557.54590.661.06
139.7250.21.79
6
2.031.940.96
754.27807.871.07
197.7405.12.05