[Co(salen)(CN)₂]⁻ as Building Block for the Design of Heterobimetallic Systems: Synthesis, Characterization, and Crystal Structures of Cyano-Bridged Co^III-Mn^II Complexes

Abstract

With trans-dicyanidecobalt(III) precursor K[Co(salen)(CN)₂]· CH₃OH (1) (H₂salen = N,N′-bis(salicyl)ethylenediamine) as build- ing block and two Mn(II) compounds containing bulky anci- llary organic ligands as assembling segments, two new cyanide- bridged heterometallic Co^III-Mn^II complexes {[Co(salen)(CN)₂]₂ [Mn(bipy)₂]}·2CH₃OH (2) and }[Co(salen)(CN)₂]₂[Mn(phen)₂]}· 0.5CH₃CN·0.5H₂O(3) have been successfully synthesized and characterized by elemental analysis, IR spectroscopy, and X-ray structure determination. Single X-ray diffraction analysis reveals the trinuclear V-shaped Co^III ₂Mn^II nature of complexes 2 and 3 comprise one [Mn(bipy)₂]²⁺/[Mn(phen)₂]²⁺ and two [Co(salen)(CN)₂]⁻ units. Interestingly, under the help of intermolecular C-H^…π interactions, both of these two complexes display two dimensional supermolecular structures.

Keywords:

• C-H^…π
• crystal structure
• cyanide-bridged
• heterome- tallic

Acknowledgments

This work was supported by the National Natural Science Foundation of China (21171107), the Natural Science Foundation of Shandong Province (ZR2011BM008), and the Science and Technology Project of High Education, Shandong Province (No. J11LB09).