TY - JOUR
T1 - Synthesis, crystal structure, and magnetic properties of binuclear Mn III-azido and 1D polymeric MnII-μ1,3- thiocyanato novel species based on a neutral hexadentate Schiff base
AU - Deoghoria, Soma
AU - Bera, Sujit K.
AU - Moulton, Brian
AU - Zaworotko, Michael J.
AU - Tuchagues, Jean Pierre
AU - Mostafa, Golam
AU - Lu, Tian Huey
AU - Chandra, Swapan K.
PY - 2005/1/27
Y1 - 2005/1/27
N2 - A binuclear manganese(III) complex [Mn2(L1)(N 3)6] (2) and an unprecedented 1D chain of manganese(II) binuclear units bridged by two end-to-end thiocyanato anions {[Mn2II(L1)(NCS)4]·2CH3CN}n (3 • 2CH3CN) have been prepared from N-(1-pyridin-2-ylbenzylidene)-N′-[2-({2-[(1-pyridin-2- ylbenzylidene)amino]ethyl}amino)ethyl]ethane-1,2-diamine (L), manganese(II) salts and azide/thiocyanate anions in air. L1, N-(1-pyridin-2- ylbenzylidene)-N-[2-(4-{2-[(1-pyridin-2-ylbenzylidene)amino]ethyl} piperazin-1-yl)ethyl]amine, results from an alkylating cyclization of the flexible hexadentate Schiff base L occurring along the course of the complexation reactions. Both complexes have been characterized by single crystal X-ray diffraction studies. The Mn centres of complexes 2 and 3 are in distorted octahedral (2: MnIIIN6, 3: MnIIN5S) coordination environments with intramolecular Mn⋯Mn distance (2: 6.473(2) Å, 3: 6.437(1) Å) consistent with the absence of intramolecular magnetic interactions. Compound 3, exhibits weak intermolecular antiferromagnetic interactions (J = -1.5 cm-1) between pairs of MnII ions bridged via two μ1,3-NCS.
AB - A binuclear manganese(III) complex [Mn2(L1)(N 3)6] (2) and an unprecedented 1D chain of manganese(II) binuclear units bridged by two end-to-end thiocyanato anions {[Mn2II(L1)(NCS)4]·2CH3CN}n (3 • 2CH3CN) have been prepared from N-(1-pyridin-2-ylbenzylidene)-N′-[2-({2-[(1-pyridin-2- ylbenzylidene)amino]ethyl}amino)ethyl]ethane-1,2-diamine (L), manganese(II) salts and azide/thiocyanate anions in air. L1, N-(1-pyridin-2- ylbenzylidene)-N-[2-(4-{2-[(1-pyridin-2-ylbenzylidene)amino]ethyl} piperazin-1-yl)ethyl]amine, results from an alkylating cyclization of the flexible hexadentate Schiff base L occurring along the course of the complexation reactions. Both complexes have been characterized by single crystal X-ray diffraction studies. The Mn centres of complexes 2 and 3 are in distorted octahedral (2: MnIIIN6, 3: MnIIN5S) coordination environments with intramolecular Mn⋯Mn distance (2: 6.473(2) Å, 3: 6.437(1) Å) consistent with the absence of intramolecular magnetic interactions. Compound 3, exhibits weak intermolecular antiferromagnetic interactions (J = -1.5 cm-1) between pairs of MnII ions bridged via two μ1,3-NCS.
KW - 1D Chains
KW - Alkylating cyclization
KW - Magnetic exchange interactions
KW - Manganese polynuclear complexes
KW - Pseudo-halide bridges
KW - Schiff bases
UR - http://www.scopus.com/inward/record.url?scp=12344250583&partnerID=8YFLogxK
U2 - 10.1016/j.poly.2004.11.014
DO - 10.1016/j.poly.2004.11.014
M3 - Article
AN - SCOPUS:12344250583
SN - 0277-5387
VL - 24
SP - 343
EP - 350
JO - Polyhedron
JF - Polyhedron
IS - 2
ER -