Der erste sechsgliedrige Zinn(II)-Übergangsmetallzyklus – [Mn(CO)4SnCl(DMF)]3 |
| |
Authors: | H-J Haupt Th Keppler U Flrke Yvon Calage |
| |
Institution: | H.-J. Haupt,Th. Keppler,U. Flörke,Yvon Calage |
| |
Abstract: | First Compound with a Six-Membered Tin(II) Transition Metal Ring – Mn(CO)4SnCl(DMF)]3 Tin(II) chloride and dimanganese decacarbonyl were reacted in dimethyl-(DMF) at 150°C or monomethylformamide (MMF) at 120°C to yellow product solvates of the type Mn(CO)4SnCl(D)]3 (D = DMF and MMF). Their identification in the case of the compound Mn(CO)4SnCl(DMF)]3 was undertaken by a single crystal X-ray analysis. As result of this determination, its central molecular fragment contained a non-planar (SnMn)3 ring with the following average bond parameters: Sn? Mn bond lengths of 258.8(5) pm, endocyclic bond angle at Mn Atom of 90.5(2)° and the corresponding angle at Sn atom of 141.6(2)°. After the result of 119Sn Mößbauer spectroscopic measurements of the title substance a tin(II) oxidation state was present. The ν(CO) i.r. absorption bands and 1H n.m.r. data of both obtained products were measured for a further characterization. With view to the mechanistic pathway of the product formation, it was ascertained by separate experiments that the postulated intermediate Cl3SnMn(CO)5 and tin(II) chloride in DMF solution produced the title compound. |
| |
Keywords: | |
|
|