Internal Rotation of Molecules with Two Inequivalent Methyl Groups: The Microwave Spectrum of N‐Methylethylidenimine

1972 ◽  
Vol 57 (3) ◽  
pp. 1219-1236 ◽  
Author(s):  
J. Meier ◽  
A. Bauder ◽  
Hs. H. Günthard
Keyword(s):  
Internal Rotation ◽  
Microwave Spectrum ◽  
Methyl Groups

The Microwave Spectrum of 2,6-Lutidine, Analysis of Internal Rotation and 14 N Hyperfine Structure

1993 ◽  
Vol 48 (11) ◽  
pp. 1093-1101 ◽  
Author(s):  
C. Thomsen ◽  
H. Dreizler
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Internal Rotation ◽  
Molecular Beam ◽  
Microwave Spectrum ◽  
Methyl Groups ◽  
Rotational Spectrum ◽  
Rotational Constants ◽  
Moments Of Inertia ◽  
Nuclear Quadrupole

Abstract The rotational spectrum of 2,6-lutidine, (CH3)2C5H3N, has been recorded between 6 and 26.5 GHz using pulsed molecular beam microwave Fourier transform spectroscopy. The rotational constants are A = 3509.7139(84) MHz, B = 1906.8639(101) MHz, and C = 1254.6215(14) MHz, the barrier to internal rotation of the two methyl groups is V3 = 1.1752 kJ/mol, their moments of inertia were found to be Iα = 3.0808(9) uÅ2 . The nitrogen nuclear quadrupole constants are χaa = +1.600(5) MHz, χbb = -4.572(3) MHz and χcc = +2.972(5) MHz.

Zum Mikrowellenspektrum des Isobutyronitrils

1967 ◽  
Vol 22 (4) ◽  
pp. 543-545 ◽  
Author(s):  
G. E. Herberich
Keyword(s):  
Lower Bound ◽  
Internal Rotation ◽  
Barrier Height ◽  
Microwave Spectrum ◽  
Coupling Constants ◽  
Methyl Groups ◽  
Kcal Mole ◽  
Rotational Constants ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

The microwave spectrum of isobutyronitrile has been investigated in the region from 5 — 30 GHz. A and C type transitions have been observed. No splittings due to internal rotation of the methyl groups could be detected and a lower bound of 2.6 kcal/mole for the barrier height is established.Values for the rotational constants are 7.940 95 ± 0.000 04, 3.968 039 ± 0.000 010 and 2.901 030 ± 0.000 010 GHz.The nuclear quadrupole coupling constants are χαα=—3.905±0.010 MHz, χbb=2.077±0.02 MHz and χcc=1.828±0.017 MHz.

ChemInform Abstract: THE MICROWAVE SPECTRUM, STRUCTURE, DIPOLE MOMENT, AND INTERNAL ROTATION OF THE METHYL ISOCYANIDE-BORANE COMPLEX

1977 ◽  
Vol 8 (21) ◽  
pp. no-no
Author(s):  
J. F. JUN. STEVENS ◽  
J. W. BEVAN ◽  
R. F. JUN. CURL ◽  
R. A. GEANANGEL ◽  
M. G. HU
Keyword(s):  
Dipole Moment ◽  
Internal Rotation ◽  
Microwave Spectrum ◽  
Methyl Isocyanide ◽  
Spectrum Structure

Facile Formation of Acetic Sulfuric Anhydride: Microwave Spectrum, Internal Rotation, and Theoretical Calculations

2017 ◽  
Vol 121 (30) ◽  
pp. 5659-5664 ◽  
Author(s):  
Anna K. Huff ◽  
Rebecca B. Mackenzie ◽  
C.J. Smith ◽  
Kenneth R. Leopold
Keyword(s):  
Internal Rotation ◽  
Theoretical Calculations ◽  
Microwave Spectrum ◽  
Sulfuric Anhydride
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