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- W2005985633 abstract "Structural optimizations of the apically substituted isomer of PH4O− and the diapically substituted isomer of PH3FO− with diffuse-function augmented 3–21G* basis sets and with the 6–31 + G* and 6–31 + + G* basis sets result in P-η4-coordination in these anions. The structures obtained are those of a hydride or fluoride ion “solvated” by or complexed with phosphine oxide, rather than phosphoranes. In contrast, 3–21G* basis sets without diffuse functions on the atom in the trans-apical position with regard to the oxy-substituent yield P-η5-phosphorane structures that appear to be computational artifacts of the small basis set; the formation of the P-η4-geometries is curtailed by the insufficient functional description of the potential trans-apical nucleophilic leaving group. The overall neutral apical isomers of PH4O− · E(E = Li+, NH4+), the diapical isomer of PH3FO−Li+, as well as the model-solvated apical isomer of PH4O− · HF favor P-η5-phosphorane geometries at all of these computational levels. The mechanism by which the E-group alters the electronic structures within PH4Oa− is discussed based on the geometries, the molecular orbitals, and electron density analysis techniques." @default.
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- W2005985633 date "1990-03-01" @default.
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- W2005985633 title "?5-P- or ?4-P-Coordination in apically oxygenated phosphoranes? Anab initio study of PH4O?, PH4O? � E (E = Li+, NH4+, and HF) and related fluorinated oxyphosphoranes" @default.
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- W2005985633 doi "https://doi.org/10.1002/jcc.540110211" @default.
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