Synthesis,solid-state and in-solution structures of a new seven coordinated manganese(II)complex via X-ray diffraction and electrospray ionization mass spectrometry

摘要

The structure of the [Mn(HPClNOL)(eta_1-NO3)(eta_2-NO3)] 1 complex [HPC1NOL = l-(bis-pyridin-2-ylmethyl-amirio)-3-chloropropan-2-ol] in the solid-state and in H2O/MeOH solution was investigated by monocrystal X-ray diffraction and ESI(+)-MS/MS.X-ray reveals that 1 is a seven-coordinated complex with a discrete mononuclear structure in which the manganese(II)ion is coordinated by the tri-podal HPC1NOL ligand and two nitrate ions,one monodentate and the other bidentate.ESI(+)-MS/MS shows that mononuclear,dinu-clear and trinuclear manganese cationic species are present in solution,probably in equilibrium with neutral 1.This contrasting scenario illustrates for 1 the importance of both solid-state and in-solution characterizations of coordination compounds with potential bioinor-ganic interest.