Antiferromagnetic coupling through cyano-bridge and H-bonds in [MnIII(3-OMesalophen)(H2O)2]2[MnIII(3-OMesalophen)(H2O)] [WV(CN)8] · 2H2O

The synthesis, X-ray structure and magnetic properties of a new octacyanotungstate(V) based zero-dimensional [MnIII(3-OMesalophen)(H2O)2]2[MnIII(3-OMesalophen)(H2O)] [WV(CN)8] · 2H2O (1) system are reported. Compound 1 crystallizes in the triclinic system, has space group image and unit cell dimensions a = 13.494(2) Å, b = 17.080(4) Å, c = 18.739(5) Å with Z = 2. The structure of 1 consists of the dimeric Mn–NC–W cyano-bridged {[Mn(3-OMesalophen)(H2O)][W(CN)8]}2− anions and bis-μ-aqua-bridged dimers of [Mn(3-OMesalophen)(H2O)2]+ cations linked by H-bonds and π–π stacking into image distinguishable structural and magnetic units. The magnetic behavior of 1 correspond to a dominant antiferromagnetic coupling within the cyano-bridged {MnIIIWV}2− dimer (J1 = −20 cm−1) and weaker AF coupling between hydrogen bonded moieties (J2 = −0.46 cm−1) with zero-field splitting D parameter of Mn(III) centre in axially distorted surroundings of −4.0 cm−1.