TY - JOUR
T1 - Novel square pyramidal copper(II) complexes of the stereospecific linear NSNN tetradentate ligand, N-[(2-pyridyl)methyl]-2-[(2-aminoethyl)thio]acetamide (pygeH). The crystal structures of [Cu(pyge)X] (X = Br, N3)
AU - Toscano, Paul J.
AU - Fordon, Kathy J.
AU - Macherone, Deborah
AU - Liu, Shuncheng
AU - Zubieta, Jon
N1 - Funding Information:
Acknowle&ements-We gratefully acknowledge the generouss upportof the StateU niversity of New York Faculty ResearchP rograma nd the U.S. Army Research Office under Grant DAAL 0338K0198W. e also thank ProfessorC . Scholesf or obtainingt her oom temperature EPR spectra.
PY - 1990
Y1 - 1990
N2 - The preparations of complexes of type [Cu(pyge)X] and [Cu(pyge)(OH2)]BF 4, where pygeH is N-[(2-pyridyl)methyl]-2-[(2-aminoethyl)thio]acetamide and X is Br, N3, NCO, NCS, OC6H4NO2-p, and NO2, are described. The new complexes have been characterized by elemental analysis, IR and electronic spectroscopy, magnetic moment, and in two cases (X = Br and OC6H4NO2-p), EPR spectroscopy. The available data suggest that the complexes are of tetragonal, probably square pyramidal geometry in solution. X-ray structural analyses of [Cu(pyge)Br] (1) and [Cu(pyge)N3] (2) were undertaken. Complex 1 crystallized in the monoclinic space group P21/n, a = 9.676(2), b = 9.147(2), c = 15.171(3) Å, β = 106.73(2)°, V = 1286.0(5) Å3, Z = 4. Refinement was based on 1594 reflections and converged at R = 0.059, Rw = 0.058. Complex 2 crystallized in the monoclinic space group P21/c, a = 9.925(2), b = 9.354(3), c = 15.141(4) Å, β = 106.96(2)°, V = 1344.3(6) Å3, Z = 4. Refinement was based on 1196 reflections and converged at R = 0.065, Rw = 0.065. The geometry of the complexes is best described as very slightly distorted square pyramidal, with the terminal amino group of the tetradentate ligand occupying the apical site. Origins of the observed stereospecificity and structural comparisons to octahedral [Co(pyge)(NO2) 2] are discussed.
AB - The preparations of complexes of type [Cu(pyge)X] and [Cu(pyge)(OH2)]BF 4, where pygeH is N-[(2-pyridyl)methyl]-2-[(2-aminoethyl)thio]acetamide and X is Br, N3, NCO, NCS, OC6H4NO2-p, and NO2, are described. The new complexes have been characterized by elemental analysis, IR and electronic spectroscopy, magnetic moment, and in two cases (X = Br and OC6H4NO2-p), EPR spectroscopy. The available data suggest that the complexes are of tetragonal, probably square pyramidal geometry in solution. X-ray structural analyses of [Cu(pyge)Br] (1) and [Cu(pyge)N3] (2) were undertaken. Complex 1 crystallized in the monoclinic space group P21/n, a = 9.676(2), b = 9.147(2), c = 15.171(3) Å, β = 106.73(2)°, V = 1286.0(5) Å3, Z = 4. Refinement was based on 1594 reflections and converged at R = 0.059, Rw = 0.058. Complex 2 crystallized in the monoclinic space group P21/c, a = 9.925(2), b = 9.354(3), c = 15.141(4) Å, β = 106.96(2)°, V = 1344.3(6) Å3, Z = 4. Refinement was based on 1196 reflections and converged at R = 0.065, Rw = 0.065. The geometry of the complexes is best described as very slightly distorted square pyramidal, with the terminal amino group of the tetradentate ligand occupying the apical site. Origins of the observed stereospecificity and structural comparisons to octahedral [Co(pyge)(NO2) 2] are discussed.
UR - http://www.scopus.com/inward/record.url?scp=0000760497&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000760497&partnerID=8YFLogxK
U2 - 10.1016/S0277-5387(00)86816-3
DO - 10.1016/S0277-5387(00)86816-3
M3 - Article
AN - SCOPUS:0000760497
SN - 0277-5387
VL - 9
SP - 2375
EP - 2383
JO - Polyhedron
JF - Polyhedron
IS - 19
ER -