Zusammenfassung
The metathesis of CpMn(CO)(NO)SnCl3 (I) and anionic carbonyls (ML-) Mn(CO)(5-), Co(CO)(4-), Cp'Mo(CO)(3-), Cp'W(CO)(3-), Cp '' Mo(CO)(3-) provided trinuclear mixed-metal complexes of general formula CpMn(CO)(NO)SnCl2ML (VIII-XII; Cp = C5H5, Cp' = C5H4CH3, Cp '' = C5H3(C4H9)(2)). Along with XII, the product of transmetallation Cp '' Mo(CO)(3)SnCl3 (XIII) was separated. Interaction of I with ...
Zusammenfassung
The metathesis of CpMn(CO)(NO)SnCl3 (I) and anionic carbonyls (ML-) Mn(CO)(5-), Co(CO)(4-), Cp'Mo(CO)(3-), Cp'W(CO)(3-), Cp '' Mo(CO)(3-) provided trinuclear mixed-metal complexes of general formula CpMn(CO)(NO)SnCl2ML (VIII-XII; Cp = C5H5, Cp' = C5H4CH3, Cp '' = C5H3(C4H9)(2)). Along with XII, the product of transmetallation Cp '' Mo(CO)(3)SnCl3 (XIII) was separated. Interaction of I with Fe-2(CO)(8)(2-) gave the mixed-metal cluster Cp(CO)(NO)Mn-SnCl2-Fe(CO)(4)-SnCl2-MnCp(CO)(NO) (XIV) which contain the pentanuclear metal-chain. As determined by the single crystal XRD analysis, the Mn-Sn distance in CpMn(CO)(NO)Sn fragment is 0.2 angstrom shorter than the expected value based on the Mn/Sn sum of covalent radii (SCR). From the other hand, the shortening of Sn-ML distances is in an accord with the donor ability of an ML fragment in the row Co(CO)(4) similar to Mn(CO)(5) < Fe(CO)(4) < CpMn(CO)(NO < Cp'Mo(CO)(3) < Cp'W(CO)(3) < Cp '' Mo(CO)(3) owing to the additive back donation of the transition metal d-LEP to Sn vacant orbitals. The absence of substantial elongation of the Sn-Cl distances may result from the pi-back donation of transition metal d-orbitals to tin d-orbitals. (C) 2012 Elsevier B. V. All rights reserved.
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