Speaker
Ibrahima Elhadji THIAM
(Department of Chemistry, University Cheikh Anta Diop, Dakar, Senegal)
Description
The very dynamic field of research for the design and synthesis of heteropolynuclear
complexes of d and f-block elements has made it possible to generate original structures with
interesting properties in various fields such as magnetism, optics, catalysis and luminescence.
The present investigation describes the synthesis and structural study of two complexes.
The complex 1 is a Heterotrinuclear complexes synthesis which was used to generate three
dimensional complexes formulated as [{Ni(L)}(K){Ni(L)}](SCN). The compound crystallizes
in the Monoclinic system Space group P2 1 /c with the following unit cell dimensions a =
11.5891(13) Å b = 17.307(2) Å c = 19.781(2) Å and b= 92.368(10)°, R1= 0.1172. In the
compound the ligand H 2 L is hexadentate. In the unit the coordination environment of the Ni
metal can be described as distorted square, the alkaline metal K is octacoordinated.
The complex 2 is a co-crystal which was a three dimensional supramolecular complexs.
formulated as [Y{Zn(L)(SCN)}(SCN) 2 ].[Y{Zn(L)(SCN)} 2 (DMF) 2 ].(NO 3 ). It crystallizes in
the triclinic space group P-1 with unit cell parameters: a = 14.8987(7) Å, b = 15.6725(8) Å, c
= 19.2339(10) Å, α = 94.610(4)°, β = 103.857(4)°, γ = 101.473(4)°, R1 = 0.063.
Heterodinuclear unit [Y{Zn(L)(SCN)}(SCN) 2 ] is co-crystallized with a heterotrinuclear unit
[Y{Zn(L)(SCN)} 2 (DMF) 2 ].(NO 3 ). In the dinuclear moiety, the ligand is hexadentate and in the
trinuclear unit, it is pentadentate with one of the oxygen methoxy group remaining
uncoordinated. The coordination environment Zn metal is 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.
Primary author
Ibrahima Elhadji THIAM
(Department of Chemistry, University Cheikh Anta Diop, Dakar, Senegal)
