35Cl NQR spectra, structure, and mutual influence of substituents in the series of chlorine-containing organic compounds of pentavalent phosphorus

Семин, Г. К.; Tsvetkov, E. N.; Khotsyanova, T. L.; Bryukhova, E. V.

doi:10.1007/bf02494635

Cited by 2 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Narrow series I–XXXVI of various complexes taken from the literature are given in Tables . The interpreting of NQR spectra on occasion involves difficulties.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

NQR parameters of complexes and polarizability effect

Egorochkin

Кузнецова

Хамалетдинова

et al. 2012

Magnetic Reson in Chemistry

View full text Add to dashboard Cite

The literature data on substituent influence on the nuclear quadrupole resonance frequencies (ν), quadrupole coupling constants (e(2) Qq ⋅ h(- 1) ), and asymmetry parameters (η) for 36 series of the H-complexes, charge-transfer complexes, transition metal complexes and other donor-acceptor complexes have been considered, using the correlation analysis. Generally the ν, e(2) Qq ⋅ h(- 1) , and η values were first established to depend on the inductive, resonance, polarizability, and steric effects of substituents. The presence or otherwise of certain effects as well as relation between their contributions are determined by the type of series. The polarizability effect owes its existence to the appearance of an excess charge on the indicator centre as a result of the complexation. The contribution of this effect ranges up to 75%.

show abstract

“…Narrow series I–XXXVI of various complexes taken from the literature are given in Tables . The interpreting of NQR spectra on occasion involves difficulties.…”

Section: Resultsmentioning

confidence: 99%

“…This influence also occurs with the variation of the charge on the Cl atom. At the same time based on some works, it may be deduced that there is correlation between the values ν , e 2 Qq ⋅ h − 1 and the charge indicated.…”

Section: Introductionmentioning

confidence: 90%

NQR parameters of complexes and polarizability effect

Egorochkin

Кузнецова

Хамалетдинова

et al. 2012

Magnetic Reson in Chemistry

View full text Add to dashboard Cite

show abstract

“…The isoelectronic series R 1 R 2 P(O)Cl and R 1 R 2 R 3 SiCl were used as references for comparison. 2 It turned out that dν/dE z for compounds of the mentioned series changes as follows:…”

mentioning

confidence: 99%

On the estimation of the field constant of 35Cl nuclear quadrupole resonance frequency in the series of [R1R2R3AsCl]+M− compounds

Семин

Bryukhova

2005

Russ Chem Bull

Self Cite

View full text Add to dashboard Cite

The field constant of the NQR frequency of a chlorine atom ( 35 Cl) in a series of arsenic derivatives [R 1 R 2 R 3 AsCl] + M -was estimated from correlations. The field frequency is ∼41.5±3.5 Hz cm kV -1 , which is nearly twice as much as that in analogous phosphorus com pounds.It is known 1 that the field constant of the NQR fre quency dν/dE z of a chlorine atom (E z is the electrostatic field intensity along the axis of the A-Cl bond) is highly characteristic and is determined only by the nature and state of a partner atom. This parameter is independent of the nature and number of substituents in the molecule for the given type of the bond. The field constant character izes the polarizability of a resonance atom and enables one to estimate the easiness of the electron density redis tribution under the field effect. Previously, 2 the field con stants of NQR frequencies of a chlorine atom bound to the tetracoordinate phosphorus atom in a series of acid chlorides of oxygen, thio, and selenium acids of penta valent phosphorus and in ionic compounds of the [R 1 R 2 R 3 PCl] + M -type have been estimated using the correlations. The isoelectronic series R 1 R 2 P(O)Cl and R 1 R 2 R 3 SiCl were used as references for comparison. 2 It turned out that dν/dE z for compounds of the mentioned series changes as follows: P(O)Cl ≈ (RO)P(S)Cl > P(S)Cl > P(Se)Cl > PCl ion .The experimental data given in Table 1 and Fig. 1 made it possible to perform similar estimations for a series of chlorine derivatives of arsenic [R 1 R 2 R 3 AsCl] + M -. If the linear correlation ν As-Cl = ν 0 + kν A-Cl obeys, then its differentiation with respect to the electric field intensity E z gives a correlation of the type dν As-Cl /dE z = kdν A-Cl /dE z .(1)When the field constant dν A-Cl /dE z is known, then the desired field can easily be estimated using the k coeffi cient. We used similar dependences for the ionic forms of the arsenic derivatives [R 1 R 2 R 3 AsCl] + M -and an R 1 R 2 R 3 GeCl series (see Fig.

show abstract

35Cl NQR spectra, structure, and mutual influence of substituents in the series of chlorine-containing organic compounds of pentavalent phosphorus

Cited by 2 publications

References 3 publications

NQR parameters of complexes and polarizability effect

NQR parameters of complexes and polarizability effect

On the estimation of the field constant of 35Cl nuclear quadrupole resonance frequency in the series of [R1R2R3AsCl]+M− compounds

Contact Info

Product

Resources

About