Abstract

The structure of 1,2-bis(4-pyridyl)­ethyl­enium tris­(malonato-κ2O,O′)­chromate(III) octahydrate, (Hbpe)3[Cr(mal)3]·8H2O, where mal is the malonate dianion (C3HO42−) and bpe is 1,2-bis(4-pyridyl)­ethyl­ene (C12H12N2), is presented. The crystal structure is made up of [Cr(mal)3]3− anions, Hbpe+ cations and water mol­ecules of crystallization. The anions are connected through hydrogen bonding involving malonate O atoms and uncoordinated water mol­ecules in distinct layers, with the cations stacked in separate layers. One of the Hbpe cations is located on a center of inversion, another one on a twofold rotation axis.

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