Structurally characterized trinuclear nickel(II) and copper(II) Salamo-type complexes: syntheses, Hirshfeld analyses and fluorescent properties

Two trinuclear Ni(II) and Cu(II) coordination compounds [{Ni(L-1)(C2H5OH)}(2)(mu-OAc)(2)Ni]center dot 2C(2)H(5)OH (1) and [{Cu(L-2) (CH3OH)}(2)(mu-OAc)(2)Cu]center dot 2CH(3)OH (2) constructed from asymmetrical Salamo-type ligands H2L1 and H2L2 (H2L1 = 5-(N,N'-diethylamino)-2,2'-[ethylenediyldioxybis(nitrilomethylidyne)]diphenol and H2L2 = 2,2'-[ethylenediyldioxybis(nitrilomethylidyne)]naphtholphenol) were synthesized and characterized by physicochemical and spectroscopic methods. Complex 1 is a centrosymmetrical trinuclear Ni(II) coordination compound. Three hexa-coordinated Ni(II) atoms have slightly distorted octahedral geometries. Complex 2 contains three hexa-coordinated Cu(II) atoms bearing distorted octahedral geometries too. In addition, the thermal analyses and Hirshfeld surfaces analyses of complexes 1 and 2 have been discussed in detail.