Novel Tin(IV) Complexes with the Hybrid Guanidine Ligand DMEGqu

Abstract

Novel Sn(IV) complexes with the guanidine-quinoline hybrid ligand DMEGqu are reported. With SnCl 4 , SnBr 4 , Me 2 SnCl 2 , Me 2 SnBr 2 , and the 3,5-di-tert-butyl-catecholate coligand complexes with different donor sets were synthesized. Four of these tin compounds have been modelled by density functional theory. Additionally, a tetranuclear Sn(IV) oxocluster with a novel structure motif, a distorted hetero-adamantane with bridging oxido and hydroxido ligands, is presented.

Guanidine Metal Complexes for Bioinorganic Chemistry and Polymerisation Catalysis

“…DMEGqu is even able to stabilise tin(IV) complexes (Fig. 19) where the guanidine C¼N bond is considerably elongated to 1.355-1.365 Å due to charge transfer to the formal tin(IV) [81]. This leads to a large ρ-value of 1.04 and an enhanced planarity of the DMEGqu moiety.…”

Adamantane-type clusters: compounds with a ubiquitous architecture but a wide variety of compositions and unexpected materials properties

“…[317] Two further examples obtained from hydrolysis are stabilized by transition metal fragments (628-629), [336,337] with the last one being a cationic species [{Sn(DMEGqu)Br}4O4(OH)2]Br2 (630, DMEGqu = N-(1,3-dimethylimidazolidin2-ylidene)quinoline-8amine) formed by SnBr4, DMEGqu and H2O and exhibiting a coordination number of 6 at the Sn center, unusual for adamantane-type structures. [338] Chemical Science Accepted Manuscript Please do not adjust margins Please do not adjust margins [304,305] [(EtSi)4S6] (566)…”

“…[W(CO)5(thf)] / THF, 12 h 3. H2O in pentane I [337] [(Sn(DMEGqu)Br)4O4(OH)2]Br2 (630) SnBr4, 3,5-ditert-butyl-o-benzoquinone, DMEGqu / THF, H2O I [338] Thex Simple derivatization reactions on [P4O6] can be carried out by adding terminal chalcogenide groups to the P moieties, oxidizing them from their III to a V state. A straightforward method is the thermal oxidation reaction in the presence of trace amount of water to form [P4O7] (631).…”