NQR and Crystal Structure of 4,5-Dichloroimidazole, C3H2N2Cl2
1992 ◽
Vol 47
(1-2)
◽
pp. 177-181
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Keyword(s):
AbstractThe two line 35Cl NQR spectrum of 4,5-dichloroimidazole was measured in the temperature range 77≦ T/K ≦ 389. The temperature dependence of the NQR frequencies conforms with the Bayer model and no phase transition is indicated in the curves v ( 35Cl)= f(T). Also the temperature coefficients of the 35Cl NQR frequencies are "normal". At 77 K the 35Cl NQR frequencies are 37.409 MHz and 36.172 MHz and at 389 K 35.758 MHz and 34.565 MHz. The compound crystallizes at room temperature with the tetragonal space group D44-P41212, Z = 8 molecules per unit cell; at 295 K : a = 684.2(5) pm, c = 2414.0(20) pm. The relations between the crystal structure and the NQR spectrum are discussed.
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1999 ◽
Vol 13
(29n31)
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pp. 3758-3763
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Keyword(s):
2007 ◽
Vol 63
(3)
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pp. o1464-o1466
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Keyword(s):
1999 ◽
Vol 54
(3)
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pp. 372-376
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1975 ◽
Vol 53
(14)
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pp. 2064-2067
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Keyword(s):
2003 ◽
Vol 18
(2)
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pp. 537-541
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