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Reference on Pople basis set
I need to write reference on 6-311++g(d,p) basis set in my work where I used it on atoms of I-II periods. Does anyone know where it was first published?
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Why does bond length decrease with increased basis set quality for SCF methods?
From Reviews in Computational Chemistry Vol. 5, for $\ce{H2O}$ using HF, MP2, CCSD, and CCSD(T), all lengths in angstroms:
$$
\small
\begin{array}{rcccc}
\text{Basis} & \text{HF} & \text{MP2}...
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