The anion [Ir6(CO)15Cl]− has been formed by treating [Ir6(CO)15]2− with FeCl3; [Ir6(CO)15Cl]− (1) is the first species formed, but if kept standing 1 slowly loses a CO ligand to give [Ir6(CO)14Cl]− (2). Compound 1 can also be obtained by treating Ir6(CO)16 with LiCl in anhydrous tetrahydrofuran, but, because of the long reaction time needed, a substantial amount of compound 2 is also formed. The crystal structures of [PPh4][Ir6(CO)15Cl] · C4H8O (1) and [PPh4][Ir6(CO)14Cl] (2) have been determined. Anion 1 contains an octahedron of iridium atoms surrounded by eleven terminal, one edge, and three face-bridging carbonyl groups, and by one terminal chlorine atom. The disposition of the bridging carbonyl groups can be related to that of Ir6(CO)16 (red isomer) in which one face-bridging carbonyl group has become edge bridging. Anion 2 contains a slightly distorted octahedron of iridium atoms bearing twelve terminal and two edge-bridging carbon monoxide groups; the chlorine atom bridges an Ir-Ir edge. The stereochemistry of anion 2 is related to that of [Ir6(CO)15]2− by replacing an edge-bridging carbonyl group by the μ-halogen atom i.e. each of the six iridium atoms is involved in only one bridge.

DELLA PERGOLA, R., Garlaschelli, L., Martinengo, S., Demartin, F., Manassero, M., Masciocchi, N., et al. (1990). Chemistry of iridium carbonyl cluster complexes - synthesis, chemical characterization and x-ray crystal-structures of [pph4][ir6(co)15cl].c4h8o and [pph4][ir6(co)14cl]. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 396(2-3), 385-399 [10.1016/0022-328X(90)85479-I].

Chemistry of iridium carbonyl cluster complexes - synthesis, chemical characterization and x-ray crystal-structures of [pph4][ir6(co)15cl].c4h8o and [pph4][ir6(co)14cl]

DELLA PERGOLA, ROBERTO;
1990

Abstract

The anion [Ir6(CO)15Cl]− has been formed by treating [Ir6(CO)15]2− with FeCl3; [Ir6(CO)15Cl]− (1) is the first species formed, but if kept standing 1 slowly loses a CO ligand to give [Ir6(CO)14Cl]− (2). Compound 1 can also be obtained by treating Ir6(CO)16 with LiCl in anhydrous tetrahydrofuran, but, because of the long reaction time needed, a substantial amount of compound 2 is also formed. The crystal structures of [PPh4][Ir6(CO)15Cl] · C4H8O (1) and [PPh4][Ir6(CO)14Cl] (2) have been determined. Anion 1 contains an octahedron of iridium atoms surrounded by eleven terminal, one edge, and three face-bridging carbonyl groups, and by one terminal chlorine atom. The disposition of the bridging carbonyl groups can be related to that of Ir6(CO)16 (red isomer) in which one face-bridging carbonyl group has become edge bridging. Anion 2 contains a slightly distorted octahedron of iridium atoms bearing twelve terminal and two edge-bridging carbon monoxide groups; the chlorine atom bridges an Ir-Ir edge. The stereochemistry of anion 2 is related to that of [Ir6(CO)15]2− by replacing an edge-bridging carbonyl group by the μ-halogen atom i.e. each of the six iridium atoms is involved in only one bridge.
Articolo in rivista - Articolo scientifico
iridium; metal cluster; halide ligand
English
1990
396
2-3
385
399
none
DELLA PERGOLA, R., Garlaschelli, L., Martinengo, S., Demartin, F., Manassero, M., Masciocchi, N., et al. (1990). Chemistry of iridium carbonyl cluster complexes - synthesis, chemical characterization and x-ray crystal-structures of [pph4][ir6(co)15cl].c4h8o and [pph4][ir6(co)14cl]. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 396(2-3), 385-399 [10.1016/0022-328X(90)85479-I].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/35062
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