ISSN:
1042-7163
Keywords:
Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
1-Substituted 4,4,6-trimethyl-1H, 4H-pyrimidine-2-thiol(L), whose substituents are C6H5 (1), p-CH3OC6H4 (2), p-O2NC6H4 (3), n-C4H9 (4), and NH2 (5), react with TeCl4, ArTeCl3 (Ar = C6H5, 4-CH3OC6H4, or 4-C2H5OC6H4), Ph2TeCl2, and Ph3TeCl, resulting in TeCl3(L-H), ArTeCl2(L-H), Ph2TeCl2.L, and Ph3TeCl.L types of compounds. Elemental analyses, molecular weights, conductances in solutions, IR, and 1H and 13C NMR spectral data of these compounds suggest that, in all of them, the pyrimidine-2-thiols ligate through sulfur only. In the first two types of derivatives, the thiol form of L reacts with tellurium moieties, resulting in the liberation of HCl. On the basis of these data TeCl3(L-H) appears to exist as a dimer in which two Te atoms are probably 5-coordinated and are bridged by two Cl. Tellurium in ArTeCl2(L-H), Ph2TeCl2.L, and Ph3TeCl.L also appears to be 5-coordinated. IR data suggest that the Te-S bond in Ph2TeCl2.L is weak and, therefore, because of partial dissociation, the molecular complexes exhibit lower molecular weights in CH3CN. Ph3TeCl.L in acetonitrile behaves as a 1:1 electrolyte. Attempts to synthesize N-, S-, and Te-containing heterocycle ring compounds from TeCl3(1/2-H) and ArTe(1/2-H)Cl2 did not succeed.
Additional Material:
4 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hc.520030209
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