2002
DOI: 10.1016/s0022-2860(02)00144-8
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The microwave spectrum of 2-methylthiazole: methyl internal rotation and 14N nuclear quadrupole coupling

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Cited by 14 publications
(15 citation statements)
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“…Some results obtained for 2MP are compared with those of other five-membered heterocycles in Figure 3. The V3 potential varies in a wide range from 34 cm 1 for 2-methylthiazole ( 6) [1], 106 cm 1 for 4-methylisothiazole ( 8) [2], 252 cm 1 for 2-methyloxazole ( 7) [21] to 280 cm 1 for 2MP (5).…”
Section: Discussionmentioning
confidence: 99%
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“…Some results obtained for 2MP are compared with those of other five-membered heterocycles in Figure 3. The V3 potential varies in a wide range from 34 cm 1 for 2-methylthiazole ( 6) [1], 106 cm 1 for 4-methylisothiazole ( 8) [2], 252 cm 1 for 2-methyloxazole ( 7) [21] to 280 cm 1 for 2MP (5).…”
Section: Discussionmentioning
confidence: 99%
“…Many investigations have been carried out on such aromatic systems, especially heterocyclic five-membered rings, to determine the methyl barrier heights, i.a. 2-methylthiazole (34.9 cm 1 ) [1], 4-methylisothiazole (105.8 cm 1 ) [2], 2,5dimethylthiophene (248.0 cm 1 ) [3], 2-acetyl-5-methylfuran (369.8 cm 1 for the trans conformer and 356.5 cm 1 for the cis conformer) [4], and 2,5-dimethylfuran (439.2 cm 1 ) [5]. From those studies it is obvious that the torsional potentials of methyl groups attached to planar aromatic rings vary in a wide range in both, shape and height.…”
Section: Introductionmentioning
confidence: 99%
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“…18 The first molecule mentioned above, 2-methylthiazole (2MTA), has been studied by Grabow et al in the frequency range from 7 GHz to 13 GHz. 14 The V 3 potential of 34.938(20) cm −1 is the lowest of all examples. Two independent fits were performed in this previous investigation using the program XIAM.…”
Section: Introductionmentioning
confidence: 93%
“…The combination of a single 14 N quadrupole coupling nucleus and methyl internal rotation can be handled with the program RAM36, which implies the molecular symmetry to be Cs. 10 With the program XIAM, the symmetry is not restricted to Cs.…”
Section: Introductionmentioning
confidence: 99%