Reactions of Ammonia and Aliphatic Amines with Sulphur Dioxide
作者:TETSUO HATA、SUSUMU KINUMAKI
DOI:10.1038/2031378b0
日期:1964.9
ALTHOUGH much work has been carried out on the reactions of ammonia with sulphur dioxide1,2, little attention has been directed to spectrochemical measurements of the reactions. Tertiary amines (such as trimethylamine and triethylamine) and aniline derivatives give well-known molecular complexes by addition of sulphurdioxide; and ultra-violet absorption spectra3,4 for the former and infra-red absorption
Matschiner, Hermann; Maschmeier, Claus-Peter; Maier, Nadja, Phosphorus, Sulfur and Silicon and the Related Elements, 1993, vol. 84, # 1-4, p. 223 - 230
Structure of the dimethylamine-sulfur dioxide complex
作者:Jung Jin Oh、Kurt W. Hillig、Robert L. Kuczkowski
DOI:10.1021/j100172a022
日期:1991.9
The microwave spectrum of the charge-transfer complex between dimethylamine and sulfur dioxide was studied with a pulsed molecular beam Fourier transform microwave spectrometer. The rotational constants (in MHz) of (CH3)2NH.SO2 are A = 4445.495 (3), B = 2063.031 (1), and C = 1752.470 (1). In addition to the normal isotopic form, the rotational spectra of the (CH3)2NH.34SO2, (CH3)2(15)NH.SO2, (CH3)2ND.SO2, and two (CH3)2NH.SO18O isotopic species were assigned. Stark effect measurements gave electric dipole components of mu-a = 4.025 (1), mu-c = 1.747 (2), and mu-total = 4.388 (1) D. The structure of this complex lacks any symmetry plane. The nitrogen lone pair points toward the S atom, nearly perpendicular to the plane of the sulfur dioxide, and one methyl group staggers the oxygen atoms. The nitrogen-to-sulfur distance of 2.34 (3) angstrom is about 0.08 angstrom longer than in the trimethylamine-SO2 complex which correlates with the relative strength of the complexes. From the dipole moment and the nitrogen nuclear quadrupole coupling constants, an upper limit is estimated for electron transfer from the nitrogen to the sulfur atom of 0.25 electron. Ab initio calculations also conclude that a methyl group staggers the two oxygens of SO2.
Krasnov, V. L.; Vasyanina, G. I.; Bodrikov, I. V., Journal of Organic Chemistry USSR (English Translation), 1987, vol. 23, # 2, p. 396 - 397
作者:Krasnov, V. L.、Vasyanina, G. I.、Bodrikov, I. V.