The effect of substituents at a coordinated center on the strength of P → Sn donor-acceptor bond

1. The thermodynamic parameters for the complexing of SnCl4 and organotin chlorides with organophosphorus donors satisfy the general linear ΔH° vs ΔS° relation applying to donor-acceptor complexes. 2. The energy of the P → Sn bond in the (C2H5)nSnCl4-n · (C4H9)3P complexes falls off as the number of Cl atoms in the acceptor molecule is reduced. 3. The energy of the P → Sn bond in the SnCl4 · R1R2R3P complexes, and of the O → Sn bond in the SnCl4 · R1R2R3PO complexes, are closely dependent on inductive and resonance effects from the substituents R1, R2, and R3. The sensitivity of the coordination centers to substituent effects is higher in the phosphines than in the phosphine oxides. © 1979 Plenum Publishing Corporation

The effect of substituents at a coordinated center on the strength of P → Sn donor-acceptor bond

1. The thermodynamic parameters for the complexing of SnCl4 and organotin chlorides with organophosphorus donors satisfy the general linear ΔH° vs ΔS° relation applying to donor-acceptor complexes. 2. The energy of the P → Sn bond in the (C2H5)nSnCl4-n · (C4H9)3P complexes falls off as the number of Cl atoms in the acceptor molecule is reduced. 3. The energy of the P → Sn bond in the SnCl4 · R1R2R3P complexes, and of the O → Sn bond in the SnCl4 · R1R2R3PO complexes, are closely dependent on inductive and resonance effects from the substituents R1, R2, and R3. The sensitivity of the coordination centers to substituent effects is higher in the phosphines than in the phosphine oxides. © 1979 Plenum Publishing Corporation

The effect of substituents at a coordinated center on the strength of P → Sn donor-acceptor bond

1. The thermodynamic parameters for the complexing of SnCl4 and organotin chlorides with organophosphorus donors satisfy the general linear ΔH° vs ΔS° relation applying to donor-acceptor complexes. 2. The energy of the P → Sn bond in the (C2H5)nSnCl4-n · (C4H9)3P complexes falls off as the number of Cl atoms in the acceptor molecule is reduced. 3. The energy of the P → Sn bond in the SnCl4 · R1R2R3P complexes, and of the O → Sn bond in the SnCl4 · R1R2R3PO complexes, are closely dependent on inductive and resonance effects from the substituents R1, R2, and R3. The sensitivity of the coordination centers to substituent effects is higher in the phosphines than in the phosphine oxides. © 1979 Plenum Publishing Corporation

The effect of substituents at a coordinated center on the strength of P → Sn donor-acceptor bond

1. The thermodynamic parameters for the complexing of SnCl4 and organotin chlorides with organophosphorus donors satisfy the general linear ΔH° vs ΔS° relation applying to donor-acceptor complexes. 2. The energy of the P → Sn bond in the (C2H5)nSnCl4-n · (C4H9)3P complexes falls off as the number of Cl atoms in the acceptor molecule is reduced. 3. The energy of the P → Sn bond in the SnCl4 · R1R2R3P complexes, and of the O → Sn bond in the SnCl4 · R1R2R3PO complexes, are closely dependent on inductive and resonance effects from the substituents R1, R2, and R3. The sensitivity of the coordination centers to substituent effects is higher in the phosphines than in the phosphine oxides. © 1979 Plenum Publishing Corporation

Enthalpies of formation and charge-transfer bands in the complexes of the sulfides and selenides of tertiary phosphines with iodine and tin tetrachloride

1. Thermodynamic parameters (ΔH°, ΔG°, ΔS°) have been determined for the complexing of organophosphorus R1R2R3PX (X=S, Se) donors with I2 and SnCl4. The entropy and enthalpy of these complexing reactions are linearly related in the manner characteristic of electron donor-acceptor complexes. 2. It is shown that the enthalpies of complexing can be correlated with the Kabachnik substituent constants in the R1R2R3PS·I2 and R1R2R3PS·SnCl4 complexes. 3. It has been found that a charge-transfer band appears in the electronic spectrum of each of these complexes, the band maximum shifting toward shorter wavelengths with an increase in the donor ionization potential. © 1979 Plenum Publishing Corporation

Enthalpies of formation and charge-transfer bands in the complexes of the sulfides and selenides of tertiary phosphines with iodine and tin tetrachloride

1. Thermodynamic parameters (ΔH°, ΔG°, ΔS°) have been determined for the complexing of organophosphorus R1R2R3PX (X=S, Se) donors with I2 and SnCl4. The entropy and enthalpy of these complexing reactions are linearly related in the manner characteristic of electron donor-acceptor complexes. 2. It is shown that the enthalpies of complexing can be correlated with the Kabachnik substituent constants in the R1R2R3PS·I2 and R1R2R3PS·SnCl4 complexes. 3. It has been found that a charge-transfer band appears in the electronic spectrum of each of these complexes, the band maximum shifting toward shorter wavelengths with an increase in the donor ionization potential. © 1979 Plenum Publishing Corporation

Enthalpies of formation and charge-transfer bands in the complexes of the sulfides and selenides of tertiary phosphines with iodine and tin tetrachloride

1. Thermodynamic parameters (ΔH°, ΔG°, ΔS°) have been determined for the complexing of organophosphorus R1R2R3PX (X=S, Se) donors with I2 and SnCl4. The entropy and enthalpy of these complexing reactions are linearly related in the manner characteristic of electron donor-acceptor complexes. 2. It is shown that the enthalpies of complexing can be correlated with the Kabachnik substituent constants in the R1R2R3PS·I2 and R1R2R3PS·SnCl4 complexes. 3. It has been found that a charge-transfer band appears in the electronic spectrum of each of these complexes, the band maximum shifting toward shorter wavelengths with an increase in the donor ionization potential. © 1979 Plenum Publishing Corporation