TY - JOUR
T1 - Structural isomerism among octanuclear oxomolybdenum(V) coordination compounds with pyridines. Two isomers of [Mo8O16(OCH3)8(R-Py)4]
AU - Modec, Barbara
AU - Brenčič, Jurij V.
AU - Finn, Robert C.
AU - Rarig, Randy S.
AU - Zubieta, Jon
N1 - Funding Information:
We are grateful to the Slovenian Ministry of Education for financial support. The work at Syracuse University was supported by a grant from the National Science Foundation, CHE9987471.
PY - 2001/10/8
Y1 - 2001/10/8
N2 - The condensation of dinuclear {Mo2O4}2+ leads, under conditions of the solvothermal synthesis, to two distinct architectures: (i) the cluster species of [Mo8O1 6(OCH3)8Py4]·2CH3OH (Py = pyridine, C5H5N) (1·2CH3OH) whose four building blocks, {Mo2O4}2+ units, are linked through doubly or triply bridging oxo and methoxo groups into a compact array; and (ii)[Mo8O16(OCH3)8(4-MePy 4] (4-MePy = 4-methylpyridine, C6H7N) (2) which displays an open, bent cyclic structure made of four building blocks linked to each other by pairs of methoxo bridges. The Mo-Mo distances within dinuclear units, 2.5638(12) and 2.6012(13) Å in 1, and 2.5661(3) Å in 2, are characteristic for single metal-metal bonds. All metal atoms of 1 are in a distorted octahedral coordination; each octahedron shares several edges (two, three or four) with its neighbors. Compound 2 displays two types of coordination polyhedra, square pyramids and octahedra (four of each) that are connected through common edges. Each polyhedron shares two edges with the adjacent polyhedra.
AB - The condensation of dinuclear {Mo2O4}2+ leads, under conditions of the solvothermal synthesis, to two distinct architectures: (i) the cluster species of [Mo8O1 6(OCH3)8Py4]·2CH3OH (Py = pyridine, C5H5N) (1·2CH3OH) whose four building blocks, {Mo2O4}2+ units, are linked through doubly or triply bridging oxo and methoxo groups into a compact array; and (ii)[Mo8O16(OCH3)8(4-MePy 4] (4-MePy = 4-methylpyridine, C6H7N) (2) which displays an open, bent cyclic structure made of four building blocks linked to each other by pairs of methoxo bridges. The Mo-Mo distances within dinuclear units, 2.5638(12) and 2.6012(13) Å in 1, and 2.5661(3) Å in 2, are characteristic for single metal-metal bonds. All metal atoms of 1 are in a distorted octahedral coordination; each octahedron shares several edges (two, three or four) with its neighbors. Compound 2 displays two types of coordination polyhedra, square pyramids and octahedra (four of each) that are connected through common edges. Each polyhedron shares two edges with the adjacent polyhedra.
KW - Crystal structures
KW - Oxomolybdenum(V) coordination compounds
KW - Structural isomerism
KW - {MoO} clusters
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U2 - 10.1016/S0020-1693(01)00586-2
DO - 10.1016/S0020-1693(01)00586-2
M3 - Article
AN - SCOPUS:0035829011
SN - 0020-1693
VL - 322
SP - 113
EP - 119
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 1-2
ER -