Journal of Molecular Structure p. 371 - 384 (1987)
Update date:2022-08-30
Topics:
Raghoottama, P. S.
Soundararajan, S.
Ramakrishna, J.
Spectroscopic investigation of 5-chloro-2-pyridone has been carried out in the temperature range 77-300 K.At room temperature the 35Cl NQR spectrum shows a single line at 35.618 MHz, but at 250.7 K two lines appear at 35.850 MHZ and 35.840 MHz respectively indicating the presence of a phase transition.IR, far-IR, laser Raman and dielectric measurements have been carried out to investigate the phase transition further.Low temperature IR studies show splitting of ν(C-Cl), β(N-H) and ν(C=O) bands at Tc.Dielectric measurements show a small, but finite, change in the value of the dielectric constant around Tc.Raman spectra at different temperatures support the existence of a new phase, as shown by the appearance of a new band at 81 cm-1, the frequency of which changes slowly as Tc is approached and which disappears at Tc.The temperature dependence of the NQR frequencies has been analysed using Bayer Kushida and Brown equations to evaluate the torsional frequencies.
View MoreSuzhou Tianma Specialty Chemicals Co.,Ltd
Contact:+86-512-68090577
Address:#199, Huayuan Rd, Mudu, Suzhou, Jiangsu, CHINA
Contact:86-575-86132822,86-575-86085355
Address:No.418 Dadao West Road,Qixing Street,Xinchang, Zhejiang Province, China.
Fujian Wanke Pharmaceutical Co., LTD.
Contact:+86-598-5026002
Address:Economic development zone,jiangle county
SHANDONG ZHANHUA YONGHAO PHARMACEUTICAL TECH.CO.,LTD
Contact:+86-576-88685096
Address:GENGJU VILLAGE NORTH ONE KILOMETER,ZHANHUA DISTRICT,BINZHOU CITY,SHANDONG PROVINCE,CHINA.
Nantong Advance Chemical Co., Ltd
Contact:86-13818730908
Address:Fine Chemical Industry Garden,Beixin Town,Qidong
Doi:10.1080/00397910802250929
(2008)Doi:10.1039/c39950002057
(1995)Doi:10.1002/adfm.201401754
(2014)Doi:10.1016/j.ejmech.2015.07.018
(2015)Doi:10.1021/ja00264a043
(1986)Doi:10.2533/000942902777680144
(2002)