Second quantization compared with first

The relative polarity of two adjacent bound atoms depends in the first place on the quantization, in the second place on polarization properties. A different quantization can lead, for the same two atoms, to the relative polarity. . A+B".. as well as. . A B+.. For instance, C as compared with Br, is more positive in acyl bromide, RCBr, but more... 

Comparing with the Slater-Condon rules for one-electron operators, we note that the second-quantization matrix elements (1.4.3), (1.4.6) and (1.4.7) will agree with their first-quantization counterparts if we make the identification... 

This expression should be compared with its first-quantization counterpart (1.5.20). For finite basis sets, the second-quantization canonical commutator turns into a general one-electron operator (1.5.28). 

---