Structural and spectral studies of thiosemicarbazones derived from 3-and 4-formylpyridine and 3-and 4-acetylpyridine

Citation
Ic. Mendes et al., Structural and spectral studies of thiosemicarbazones derived from 3-and 4-formylpyridine and 3-and 4-acetylpyridine, J MOL STRUC, 559(1-3), 2001, pp. 355-360
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF MOLECULAR STRUCTURE
ISSN journal
0022-2860 → ACNP
Volume
559
Issue
1-3
Year of publication
2001
Pages
355 - 360
Database
ISI
SICI code
0022-2860(20010107)559:1-3<355:SASSOT>2.0.ZU;2-B
Abstract
Crystal structures of thiosemicarbazones prepared from 3- and 4-formylpyrid ine and 3- and 4-acetylpyridine are included along with their UV spectra. 4 -Formylpyridine thiosemicarbazone has the following structural properties: monoclinic, P2(1)/n, a = 7.2420(5), b = 13.961(1), c = 8.415(1) Angstrom, b eta = 90.90(1)degrees. V = 850.7(1) Angstrom (3) and Z = 4, for 3-formylpyr idine thiosemicarbazone: monoclinic, C2/c, a = 13.661(2), b = 7.1120(4), c = 19.046(2) Angstrom, beta = 107.71(1)degrees, V = 1762.8(3) Angstrom (3) a nd Z = 8, for 4-acetylpyridine thiosemicarbazone: triclinic, P-1, a = 8.104 (3), b = 8.512(2), c = 8.708(3) Angstrom, alpha = 83.85(0), beta = 66.66(0) , gamma = 62.87(0)degrees, V = 488.9(3) Angstrom (3) and Z = 2; for 3-acety ipyridine thiosemicarbazone monoclinic, P2(1)/a, a = 8.408(1), b = 11.853(2 ), = c = 9.777(3) Angstrom, beta = 97.66(2)degrees. V = 985.7(3) Angstrom ( 3) and Z = 4. Intramolecular and intermolecular hydrogen bonding are both p resent. There is a difference in the angles between the mean planes of the pyridine ring and thiosemicarbazone moiety in the two series. (C) 2001 Else vier Science B.V. All rights reserved.