2-imino-4-oxo-1,3-thiazolidine complexes of silver(I), zinc(II), cadmium(II) and mercury(II)

Perchlorate Ion Complexes

Abstract: Publisher Summary This chapter discusses the perchlorate ion complexes. Coordination of perchlorate to transition and nontransition metal ions has been well established, though in most of the cases the metal-perchlorate bond is rather weak and has been termed as “semicoordination”. The highly symmetrical perchlorate ion is a hard base and falls into the category of relatively nonpolarizable and noncoordinating anions such as BF 4 ˉ and PF 6 ˉ. Its ability to coordinate strongly to soft metal ions is therefore limited. When coordination does occur, the perchlorate group may be linked to a metal ion in a monodentate and/or bidentate manner through oxygen atoms; the latter linkage can be either chelating. X-ray crystal structure analysis has unequivocally established coordination of perchlorate in a number of perchlorate complexes.

Organomercury(II) derivatives of 2-thiouracil. An infrared and proton magnetic resonance study of structures

Abstract: The novel complexes RHg(s2UraH−1) (R = Me, Ph) where s2UraH−1 is the monoanion of 2-thiouracil, have been synthesized. Comparison of the infrared spectra of the solid complexes and of 1H nuclear magnetic resonance spectra of the complexes in dimethyl-d6 sulfoxide with spectra of s2 Ura and Na[s2UraH−1] allows the recognition of the existence of isomers in the solid, with bonding to exocyclic sulfur and to pyrimidine nitrogens. In solution, a simpler pattern is observed, with 2J(1H199Hg) indicating bonding to sulfur only.

Ligating properties of model bioheterocyclics. Ill. Synthesis and characterization of the palladium(II) and platinum(II) Complexes with 3,6-disubstituted-2,7-dihydro-1,4,5-thiadinzepine derivatives

Abstract: Palladium(II) and platinum(II) halides with 3,6-disubstituted-2,7-dihydro-1,4,5-thiadiazepine derivatives (L) form complexes of general formula, [MX 2 ·L′] (L′ = monohydrazone, VII). During the formation of these complexes, the thiadiazepine ring underwent hydrolytic cleavage at the carbon- nitrogen double bond, the nitrogen of which is involved in coordination with the metal ions These complexes have also been obtained from mono. hydrozones of 2,2″-thiodiacetophenones. These are diamagnetic and non-electrolytes. From their it, n.m.r., electronic spectra, T.G.A., D.T.A., magnetic susceptibility and conductivity measurements, these complexes have been assigned a square planar structure.

The Coordination Chemistry of the Mercuric Halides

Abstract: Review: Ubersicht uber Strukturen und Spektren von festen Quecksilberhalogeniden und ihren Solvaten.