Co-crystal structure of a dinuclear (Zn-Y) and a trinuclear (Zn-Y-Zn) complexes derived from a Schiff base ligand

Abstract

The present investigation describes the synthesis and structural study of a metal-zinc ligand [ZnL.H2O], which was used to generate three dimensional supramolecular complex formulated as [Y{Zn(L)(SCN)}(SCN)2].[Y{Zn(L)(SCN)}2(DMF)2].(NO3). The title compound crystallizes in the triclinic space group P-1 with the following unit cell parameters: a = 14.8987(7) Å, b = 15.6725(8) Å, c = 19.2339(10) Å, a = 94.610(4)°, β = 103.857(4)°, γ = 101.473(4)°, V = 4234.4(4) Å3, Z = 2, R1 = 0.063 and wR2 = 0.96. For this compound, the structure reveals that one heterodinuclear unit [Y{Zn(L)(SCN)}(SCN)2] is co-crystallized with a heterotrinuclear unit [Y{Zn(L)(SCN)}2(DMF)2].(NO3). In the dinuclear moiety, the organic molecule acts as a hexadentate ligand and in the trinuclear unit, it acts as a pentadentate ligand with one of the oxygen methoxy group remaining uncoordinated. In both units the coordination environment of the zinc metal can be described as distorted square pyramidal. In the dinuclear unit the Y(III) is hexacoordinated while it is octacoordinated in the trinuclear unit. The environment of the Y(III) can be described as a distorted octahedral geometry in the dinuclear and as a distorted square antiprism in the trinuclear units respectively.

A new co-crystal dinuclear/trinuclear ZnII–ZnII/ZnII–SmIII–ZnII complex with a salen-type Schiff base ligand

“…In all, there are thirteen entries for hetero trinuclear 3d-4f-3d complexes in which the 3d metal ion is Zn 2+ [DEJKUZ and DEJLIO (Wong et al, 2006), DUCKAO, DUCKOC, DUCKUI, DUCLAP and DUCLET (Wang et al, 2009), EJAGIG (Liao et al, 2010), GICCEC and GICCIG (Yang et al, 2013), QUQKUK, QUQLAR and QUQLEV (Sun et al, 2016)]. Combinations of mononuclear and hetero dinuclear coordination complexes as co-crystals are observed in three cases [BICBEW and BICBIA (Biswas et al, 2013b), KAZPOT (Andrez et al, 2017)], while the combination of hetero dinuclear and hetero trinuclear coordination complexes as a co-crystal is observed in one case (Sarr et al, 2018).…”

Synthesis and Structural Study of the Mixed Copper (II)/lanthanum (III) Complex with the Bicompartmental Ligand H2L = 2,2'-{propane-1,2-diyl bis[Nitrilomethylylidene ]}Bis(6-Methoxyphenol)

“…Since the exploration of new properties, bicompartmental Schiff bases derived from ovanillin are widely used to prepare homo and heteronuclear 3d-3d, 3d-3f, 3d-ns complexes [1,2], they are often represented as a ligand with two differently sized pockets.…”

Syntheses, Characterization and X-ray Crystal Structure of Trinuclear NiII—NaI—NiII Assembled with Salen-type Schiff Base

“…Schiff bases with two cavities of different sizes which can accommodate metal ions of different sizes have 154 been synthesized using condensation reaction between well-selected keto precursors and diamines [1][2][3]. Trinuclear complexes formed by two 3d metals with organic ligand in which the 3d metal atom is situated in the smaller N 2 O 2 cage and one s-, d-or fblockmetal ion is coordinated to larger O 2 O 2 cage have been reported [4][5][6][7][8][9][10][11][12][13]. Two different strategies are developed for preparing heteronuclear complexes.…”