Question
Compare the characteristics of electron-rich phosphines with those of electron poor phosphines regarding their σ donor and π acceptor capacities. What happens to these characteristics when the average electronegativity of the three groups attached to P increases?
Answer :
Word Count : 236
Electron-rich phosphines are those ligands in which the substituents on phosphorus donate significant electron density to the central atom. Such phosphines have strong σ donor capacity because the phosphorus lone pair becomes more available for donation to the metal center. Their π acceptor capacity, however, is relatively weak since the phosphorus atom already holds an abundance of electron density ___ ____ _________ __________ _______ ________ ________ ________ ______ ___ ___ ___.
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Electron-rich phosphines are those ligands in which the substituents on phosphorus donate significant electron density to the central atom. Such phosphines have strong σ donor capacity because the phosphorus lone pair becomes more available for donation to the metal center. Their π acceptor capacity, however, is relatively weak since the phosphorus atom already holds an abundance of electron density ___ ____ _________ __________ _______ ________ ________ ________ ______ ___ ___ ___.
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