251968-40-8Relevant articles and documents
Synthesis and Structure of Copper(II) Complexes with ortho-Phthalic Acid
Gerbeleu,Simonov,Timko,Bourosh,Lipkowski,Baka,Saburov,Mazus
, p. 1191 - 1204 (2008/10/08)
The new compounds with o-phthalic acid [Cu(HPht)2Py2] (I), [Cu(HPht)2(γ-Pic)2] (II), and [Cu2(Pht)2(γ-Pic)4 · H2O] (III) were synthesized and characterized by IR and UV spectroscopy. The structures of I-III were determined by X-ray crystallography. The structures of I and II are composed of molecular complexes in which one of the carboxy groups is neutral. The copper coordination is cis-octahedral. The Cu(1)-N(1) distance is 2.001(4) A? for I and 2.008(7) for II. The Cu(1)-O(2) bond length is 2.012(3) A? for I and 2.010(5) A? for II, and the Cu(1)-O(1) distance for the same carboxy group is 2.426(3) A? in I and 2.456(5) A? in II. The coordinated carboxyl moiety exhibits the 21 coordination mode. The structure of III is polymeric. Two independent copper(II) atoms have different coordination environments. The Cu(1) atom is in a square-planar environment with the Cu(1)-N distances of 1.985(7) and 2.012(7) A?, and Cu(1)-O distances of 2.001(6) and 1.995(7) A?. The coordination polyhedron of the copper atom of the other type contains, in addition to two γ-Pic molecules (both Cu(2)-N distances are 2.017(5) A?), an H2O molecule (Cu(2)-O(1w) = 2.053(5) A?) and a carboxyl O atom (2.003(5) A?). The coordination polyhedron is completed to a square pyramid by the oxygen atom of the second Pht bridging ligand (Cu-O = 2.240(4) A?). The coordinated carboxyl moieties exhibit the 1-c coordination mode.
