TY - JOUR
T1 - Chain-Structured cis-Hydroxoaquachromium(III) Complexes and Their Magnetic Properties
AU - Ardon, Michael
AU - Bino, Avi
AU - Michelsen, Kirsten
AU - Pedersen, Erik
AU - Thompson, Robert C.
PY - 1997
Y1 - 1997
N2 - Antiferromagnetic coupling between chromium(III) atoms was found to exist in two cis-hydroxoaquachromiu(III) complexes, having a chain structure with μ-H3O2- bridges. Compound 1, trans-[Cr(Py)2(H3O2)2]Cl (Py = pyridine), consists of infinite chains of Cr(III) ions bridged by two H3O2- units with Cr···Cr and O···O separations of 5.2073(5) and 2.422(2) Å, respectively. Compound 2, α-cis-[Cr(bispicen)(H3O2)]I2 [bispicen = N,N′-bis(2-pyridylmethyl)-1,2-ethanediamine], consists of infinite chains of Cr(III) ions bridged by one H3O2- unit with Cr···Cr and O···O separations of 5.6328(6) and 2.428(5) Å, respectively. The exchange coupling constants, J = -1.31 cm-1 in 1 and J = -0.47 cm-1 in 2, were obtained by magnetic susceptibility measurements between 2 and 81 K. These values indicate intrachain antiferromagnetic interactions, mediated by hydrogen bonding through μ-H3O2 bridges. Compound 1 crystallizes in the monoclinic space group C2/c with a = 9.967(1) Å, b = 15.020(3) Å, c = 9.909(2) Å, β= 116.81(3)°, and Z = 4. Compound 2 crystallizes in the monoclinic space group C2/c with a = 21.380(4) Å, b = 9.793(1) Å, c = 10.220(2) Å, β= 116.69(2)° and Z = 4.
AB - Antiferromagnetic coupling between chromium(III) atoms was found to exist in two cis-hydroxoaquachromiu(III) complexes, having a chain structure with μ-H3O2- bridges. Compound 1, trans-[Cr(Py)2(H3O2)2]Cl (Py = pyridine), consists of infinite chains of Cr(III) ions bridged by two H3O2- units with Cr···Cr and O···O separations of 5.2073(5) and 2.422(2) Å, respectively. Compound 2, α-cis-[Cr(bispicen)(H3O2)]I2 [bispicen = N,N′-bis(2-pyridylmethyl)-1,2-ethanediamine], consists of infinite chains of Cr(III) ions bridged by one H3O2- unit with Cr···Cr and O···O separations of 5.6328(6) and 2.428(5) Å, respectively. The exchange coupling constants, J = -1.31 cm-1 in 1 and J = -0.47 cm-1 in 2, were obtained by magnetic susceptibility measurements between 2 and 81 K. These values indicate intrachain antiferromagnetic interactions, mediated by hydrogen bonding through μ-H3O2 bridges. Compound 1 crystallizes in the monoclinic space group C2/c with a = 9.967(1) Å, b = 15.020(3) Å, c = 9.909(2) Å, β= 116.81(3)°, and Z = 4. Compound 2 crystallizes in the monoclinic space group C2/c with a = 21.380(4) Å, b = 9.793(1) Å, c = 10.220(2) Å, β= 116.69(2)° and Z = 4.
UR - http://www.scopus.com/inward/record.url?scp=0642347881&partnerID=8YFLogxK
U2 - 10.1021/ic9701221
DO - 10.1021/ic9701221
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:0642347881
SN - 0020-1669
VL - 36
SP - x1-4150
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 19
ER -