Abstract
It is indicated that the effects of neglecting 1. the inter-atomic electrostatic field effects (M i ) and 2. the correction required to compensate the off-diagonal elements for the constant potential −Z implicitly included by approximating the diagonal elements as VSIE's largely cancel. To the extent that this cancellation holds, previous EH calculations may be rationalised in this regard.
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Smith, P.W., Stoessiger, R. & Wedd, A.G. Comment on the Extended Hückel method applied to transition metal complexes. Theoret. Chim. Acta 11, 81–84 (1968). https://doi.org/10.1007/BF00526071
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DOI: https://doi.org/10.1007/BF00526071