Synthesis and X-ray Crystal Structure of [Cu^IN(R₂PS)₂]₃

Abstract

Simple one-stage reactions of dithioimidophosphinates with CuCl or CuCl2 give trinuclear copper complexes [CuIR2P(S)NHP(S)R‘2]3 which contain Cu3S3 cores. Nonsymmetrical ligands coordinate to give isomers with or without pseudo-3-fold symmetry.

New tellurium-containing ring systems

“…The X-ray structure of 23c revealed that it is trimeric like the corresponding sulfur and selenium complexes, respectively (Fig. 10) [29,27]. However, the tellurium derivative 23c exhibits significant structural differences compared to 23a and 23b, in which all three ligands are coordinated to the copper centres via one two-coordinate and one three-coordinate chalcogen atom.…”

Copper(I) Complexes with a Cu4S6‐ and CuS4‐Type Core Obtained from the Reaction of Copper(0) with HN(SPPh2)2·I2

“…[1] A literature survey reveals that there have been some studies on the reaction of L with Cu II salts, and these have led to the synthesis of complexes [ 4 ].…”

“…Furthermore, the ability of L to form a tetrahedral CuS 4 core with the Cu II ion has been used by Bereman et al [3] to propose the complex [Cu(L) 2 ] as a potential model for type-I Cu II sites in metalloenzymes; unfortunately, the complex was not stable for more than a few days at room tempera- form a slightly distorted tetrahedral CuS 4 core. The 31 P NMR spectroscopic data of compound 1 are consistent with the maintenance of its structure in solution.…”

“…Moreover, phosphorus variable-temperature measurements indicate a change from a two-spin coupled AB system at 0°C to an A 2 spin system at 40°C. The reaction of [Cu 4 (L) 3 ] + with HI, monitored by 31 P NMR spectroscopy, leads to the protonation of the complexed ligands at the Cu 4 core and formation of the cation [Cu 4 (HL) 3 ] 4+ . The protonation reaction is reversible: increasing the amount of organic base 1, 8- [4] The X-ray crystal structures of these complexes revealed that the molecules contain a six-membered Cu I 3 S 3 ring in their core, with each copper atom being tricoordinate in an approximately trigonal geometry resulting from the coordination of one terminal and two bridging S-donors.…”

“…In fact, this kind of reaction has proved to be an interesting and promising synthetic route, as it has often led to the preparation of complexes with unusual stoichiometries and geometrical features. [7] The reaction between the HL·I 2 adduct and copper(0) powder has been investigated, and the X-ray crystal structures of complexes [Cu 4 4+ has also been evaluated as a dependence on the acid/base behaviour of the metal-complexed ligands L and HL (Scheme 1). Scheme 1.…”