Nuclear quadrupole resonance in coordination compounds

Ramakrishnan, Latha; Soundararajan, S.; Sastry, V. S. S.; Ramakrishna, J.

doi:10.1016/s0010-8545(00)80434-8

Cited by 32 publications

(10 citation statements)

References 201 publications

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“…Some complexes of Sb(III) and Bi(III) have analogs among complexes of trivalent aluminium, gallium, indium, and thallium, whose NQR spectra were reported and discussed by Deeg and Weiss [1,2], Ramakrishnan and co-authors [3], Chihara and Nakamura [4], Guibe and Jugie [5], and Semin with co-authors [6].…”

Section: Resultsmentioning

confidence: 99%

“…A nonlinear change of the asymmetry parameter r/ is observed for the remaining M 2 SbF 5 (M = Na, Rb, Cs, Tl, and CN 3 …”

Section: Complexes Msb 3 F ]0mentioning

confidence: 97%

“…The NQR spectra of antimony(III) fluoride complexes with monovalent MSb 4 [7] exhibit doublet NQR spectra at 77 K; 3) the temperature coefficients of the NQR frequencies for RbSb 4 F 13 are negative [14] like those for SbF 3 , but their values differ from one another in the range 77-270 K (Fig. 2); 4) the complex RbSb 4 F 13 exhibits piezoelectric properties.…”

Section: Homoligand Fluoride Complexes Of Antimony(iii)mentioning

confidence: 99%

“…The acceptor properties of the SbX 3 halides (X = Cl, Br, and I), which are typical Lewis acids, are well known [1][2][3]. The Lewis acid properties of Sb(III) halides increase in the sequence SbCl 3 > SbBr 3 > Sbl 3 , but the available data are too scarce to place SbF 3 in this series [63].…”

Section: Adducts Sbf 3 L Nmentioning

confidence: 99%

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^121,123Sb and ²⁰⁹Bi Nuclear Quadrupole Resonance Study of Complex Compounds of Antimony(III) and Bismuth(III) in the Temperature Range 77-400 K

Земнухова

Давидович

1998

Zeitschrift Für Naturforschung A

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Section: Resultsmentioning

confidence: 99%

“…A nonlinear change of the asymmetry parameter r/ is observed for the remaining M 2 SbF 5 (M = Na, Rb, Cs, Tl, and CN 3 …”

Section: Complexes Msb 3 F ]0mentioning

confidence: 97%

Section: Homoligand Fluoride Complexes Of Antimony(iii)mentioning

confidence: 99%

Section: Adducts Sbf 3 L Nmentioning

confidence: 99%

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^121,123Sb and ²⁰⁹Bi Nuclear Quadrupole Resonance Study of Complex Compounds of Antimony(III) and Bismuth(III) in the Temperature Range 77-400 K

Земнухова

Давидович

1998

Zeitschrift Für Naturforschung A

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“…The structure and coordination environment of mercury in mercuric halide complexes have been studied using N Q R in addition to other techniques like X-ray diffraction and IR [1,2]. W ulfsberg [3] has analysed the N Q R data of many mercuric halidepolyether complexes in this respect.…”

Section: Introductionmentioning

confidence: 99%

Halogen NQR Studies in Certain Mercuric Halide-Polyether Complexes

Indumathy

Sridharan

Ramakrishna

et al. 1986

Zeitschrift Für Naturforschung A

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The temperature variation o f 35C1 and 81 Br N Q R frequencies are reported for mercuric chloride ■ triethylene glycol dimethyl ether (H gC l2 • triglyme), mercuric chloride ■ diethylene glycol dimethyl ether (H gC l2 • diglym e), and mercuric bromide • diethylene glycol dimethyl ether (HgBr2 • diglym e). The frequencies have been assigned to the appropriate halogens using molecular models which take into account the various intra-and inter-molecular interactions in the solid state. The observed temperature variation o f the NQ R frequencies, in the range 7 7 -3 0 0 K. has been analysed using the two torsional m ode analysis in the framework o f the Bayer-Kushida-Brown m ethod with Tatsuzaki's correction to obtain the torsional frequencies and their average temperature coefficients.

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Nuclear Quadrupole Resonance (NQR) Spectroscopy

Wulfsberg

2005

Encyclopedia of Inorganic Chemistry

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The article concerns the usefulness of nuclear quadrupole resonance (NQR) spectroscopy in inorganic and organometallic chemistry. NQR‐active nuclei have spin I ≥ 1; those of high enough abundance to be commonly useful are found in the odd‐numbered groups of the periodic table. These are tabulated and examples given for each. The number of NQR frequencies observed in a solid‐state compound reflects the number of chemically different quadrupolar atoms in the compound and also the number of crystallographically inequivalent atoms; changes in the latter may indicate phase transitions or different polymorphs of a given compound. More commonly, one uses average NQR frequencies for chemically different atoms, and from these average frequencies, derives atomic parameters such as populations of valence orbitals, partial ionic charges, π‐bond orders, and covalent bond orders of the quadrupolar atom. The article mainly reviews selected applications of halogen ( 35 Cl, 79, 81 Br, 127 I) NQR to specific bonding questions in inorganic chemistry, and divides these according to whether the halogen or other atoms are (a) single bonded, (b) single bonded but with secondary bonds with other atoms, or (c) bonded to several atoms. For singly bonded atoms, the applications reviewed include (a1) relativistic effects, (a2) effects of nearby ionic charges on haloacetate ions, (a3) the contrasting effects of nearby ionic charges on halometallate ions, (a4) effects of intramolecular partial charges on chlorines in organosilicon compounds, (a5) cis‐and trans‐ ligand effects in substituted halometallate complexes, and (a6) interpretations of multicentered bonding in trihalide ions. Secondary bonding of single‐bonded halogen atoms are reviewed particularly in the cases of (b1) halocarbons as ligands, (b2) chloroacetates and chlorophenolates as chlorine‐donor ligands, and (b3) in salts of weakly coordinated halogenated anions. Finally, some illustrations are given of NQR studies of central multicoordinated atoms (for example, transition‐metal atoms in complexes).

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Nuclear quadrupole resonance in coordination compounds

Cited by 32 publications

References 201 publications

^121,123Sb and ²⁰⁹Bi Nuclear Quadrupole Resonance Study of Complex Compounds of Antimony(III) and Bismuth(III) in the Temperature Range 77-400 K

^121,123Sb and ²⁰⁹Bi Nuclear Quadrupole Resonance Study of Complex Compounds of Antimony(III) and Bismuth(III) in the Temperature Range 77-400 K

Halogen NQR Studies in Certain Mercuric Halide-Polyether Complexes

Nuclear Quadrupole Resonance (NQR) Spectroscopy

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Nuclear quadrupole resonance in coordination compounds

Cited by 32 publications

References 201 publications

121,123Sb and 209Bi Nuclear Quadrupole Resonance Study of Complex Compounds of Antimony(III) and Bismuth(III) in the Temperature Range 77-400 K

121,123Sb and 209Bi Nuclear Quadrupole Resonance Study of Complex Compounds of Antimony(III) and Bismuth(III) in the Temperature Range 77-400 K

Halogen NQR Studies in Certain Mercuric Halide-Polyether Complexes

Nuclear Quadrupole Resonance (NQR) Spectroscopy

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^121,123Sb and ²⁰⁹Bi Nuclear Quadrupole Resonance Study of Complex Compounds of Antimony(III) and Bismuth(III) in the Temperature Range 77-400 K

^121,123Sb and ²⁰⁹Bi Nuclear Quadrupole Resonance Study of Complex Compounds of Antimony(III) and Bismuth(III) in the Temperature Range 77-400 K