Alkoxyphenyltrichlorostannane35Cl NQR spectra

Irkutsk Organic Chemistry Institute, Siberian Branch, USSR Academy of Sciences. Translated from Zhurnal Strukturnoi Khimii, Vol. 30, No. 1, pp. 169–171, January–February, 1989.     

35Cl and79Br NQR spectra of halofluorosulfates

Conclusions NQR spectroscopy was used to find the localization of formal positive charge on the chlorine and bromine atoms in ClOSO₂F and BrOSO₂F.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 244–245, January, 1986.     

35Cl and79Br NQR spectra of dicyclopentadienylzirconium halides

Conclusions The NQR frequencies of the³⁵Cl and⁷⁹Br atoms in dicyclopentadienylzirconium dichloride and the corresponding dibromide are 25–30% lower than for the analogous titanium derivatives, which corresponds to a greater involvement of the P electrons of the halogen atoms in the Zr-Hal bond than in the Ti-Hal bond.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1895–1897, August, 1979.The authors are indebted to G. K. Semin for his interest in the work, and to R. Kh. Freidlina and É. M. Brainina for supplying the study samples.     

35Cl NQR spectra of osmium and iridium chlorochalcogen complexes

Conclusions A study was carried out on the NQR spectra of the chlorine atoms in Os(IV) and Ir(III) complexes with sulfur, selenium, and tellurium chlorides as ligands. The ECl₃ group coordinates as the ligand in the osmium compounds studied.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1409–1411, June, 1986.     

35Cl NQR spectra of several aryl chloromethyl ethers

Conclusions There is a significant specific geminal interaction of the oxygen and chlorine atom in aryl chloromethyl ethers, p-RC₆H₄OCH₂Cl, although this effect is less than in alkyl chloro-methyl ethers.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1195–1197, May, 1985.     

35Cl NQR spectra of several rhenium chalcochloride complexes

The³⁵Cl NQR spectra were studied for rhenium chalcochloride complexes ReX₂Cl₁₂ (X=Se, Te), Re₂XCl₁₂ (X=S, Se), and thet- and-forms of ReCl₄ and the⁷⁹Br NQR spectrum of ReBr₃ were also studied. The ReX₂Cl₁₂ complexes were found to have ReCl₆(XCl₃)₂ structure, while Re₂SCl₁₂ has Re₂Cl₉(SCl₃) structure; the selenium analog has a more complex structure. Significant differences in the halide ions were also found in rhenium halides.Deceased.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 192–195, January, 1991.     

35Cl and79Br NQR spectra of some acetylenic derivatives

Conclusions A study was made of the NQR spectra of the ethynyl derivatives of 4-chlorophenylacetylene and it was established that in its conductive properties the phenylacetylene system is close to the p-phenylene system.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1160–1161, May, 1973.The authors are sincerely grateful to G. K. Semin for his valuable suggestions and attention to the work.     

Cl35 NQR spectra and the transmission effects in the series RSO2Cl

Conclusions It was shown by correlating the Cl³⁵ NQR frequencies with the Taft _I and _c parameters that the effect of substituents, which are either capable of conjugation (Hal, OR, NR₂) or are alkyl groups, is transmitted to the chlorine atom through the SO₂Cl group by a practically purely inductive means.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 486–488, February, 1970.     

35Cl and79Br NQR spectra of dicyclopentadienyl-tungsten and molybdenum dihalides

Conclusions The NQR frequencies of the studied Cp₂WHal₂ are nearly twice the frequencies of the analogous titanium derivatives, which can be due to a much smaller involvement of the p electrons of the halogen atom in forming the W-Hal bond when compared with Ti-Hal.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 459–460, February, 1979.     

Electronic structure analysis of 4-chlorophenylisoxazoles and 4-chloroisoxazolines by35Cl NQR spectra and quantum chemical calculations

Electronic structure of substituted phenylisoxazoles and substituted isoxazolines is examined by³⁵Cl NQR and MINDO/3 calculations. It is shown that the chlorine atom in the 4-position of the isoxazole ring serves to transmit the influence from the phenyl ring in the 3-position to that in the 5-position. The influence is transferred via both the σ- and π-bond systems. Tomsk State Pedagogical Institute. Institute of Chemistry, A. Mitskevich University. Institute of Biophysics, Health Ministry of Russia. Translated fromZhurnal Strukturnoi Khimii, Vol. 35, No. 2, pp. 61–68, March–April, 1994. Translated by L. Smolina     

Quantum chemical calculations and35Cl NQR study of the molecular structure of trichloroacetyl halides and trichloroacetaldehyde

An optimal geometry of CCl₃C(O) X molecules (X=H, F, Cl, Br, and I) is determined by the MNDO quantum chemical method. According to the results of calculations, the molecules in the free state have an eclipsed conformation with a syn-peri-planar position of the oxygen atom and one of the chlorine atoms of the trichloromethyl group. However, as follows from the³⁵Cl NQR spectra at different temperatures, in the crystal state of CCl₃C(O)X this conformation is distorted under the influence of intermolecular interactions due to the torsional rotation of the CCl₃ group around the C-C bond. Indicatory potentialities of the NQR method with respect to the structural features that are due to crystallographic effects are discussed. Perm State University. Translated fromZhurnal Strukturmoi Khimii, Vol. 37, No. 3, pp. 494–500, May-June, 1996.     

35Cl NQR and dynamic structure of pentafluorochlorobenzene in the solid state

Institute of Crystallography, Academy of Sciences of the USSR. Translated from Zhurnal Strukturnoi Khimii, Vol. 32, No. 4, pp. 170–171, July–August, 1991.     

35Cl NQR of cyclic α-chlorovinyl ethers and orbital interactions in O-C-Cl triad

Conclusions In a series of compounds with fragments OC_sp3-Cl or OC_sp2-Cl, O=CCl, the relationships observed in the changes in³⁵Cl NQR frequencies are explained by geometric and energy characteristics of the orbitals n(0) and*(CCl).Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2204–2207, October, 1985.