MS36-P33 Crystal nickel(II) complexes with a bidentate hydrazone ligandThe Schiff base ligands are frequently used in the synthesis of new coordination compounds with interesting structures and promising properties in different fields. In this work we describe the results of a crystal study about the reactivity in ethanol between nickel(II) acetate and the bidentate Schiff ligand (E)-N’-(4-Hydroxybenzylidene)-4- hydroxybenzohydrazide (H2L). 
As is shown in the image, two types of crystal nickel compounds have been isolated. So first crystallized the green octahedral complex [Ni(H2L)2(H2O)2]Ac2∙2EtOH and later orange crystals of the square-planar compound [Ni(HL)2]∙2H2O were formed after the monodeprotonation of the ligand.
Acknowledgements: Financial support from Ministry of Economy, Industry and Competitiveness (Spain) and European Regional Development Fund (EU) (CTQ2015-71211-REDT and CTQ2015-70901-R) is gratefully acknowledged.References:
 C-M. Li, H-Y. Ban, Acta Cryst. 2009, E65, o1465.Keywords: hydrazone, nickel(II), complexes