Mono- and Dinuclear Five-coordinate Cyclometalated Palladium(II) Compounds
Reaction of cyclometalated halide-bridged Pd(II) complexes 1−4 with the tertiary triphosphine ligand (Ph2PCH2CH2)2PPh (triphos) yielded complexes [{(Ph2PCH2CH2)2PPh-P,P,P}Pd{N(Cy)=(H)C}C6H2{C(H)N(Cy)}Pd{(Ph2PCH2CH2)2PPh-P,P,P}][ClO4]2 5, [Pd{C6H4-NNC6H5}{(Ph2PCH2CH2)2PPh-P,P,P}][ClO4] 6, and [Pd{R...
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Published in | Inorganic chemistry Vol. 40; no. 18; pp. 4583 - 4587 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
American Chemical Society
27.08.2001
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Online Access | Get full text |
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Summary: | Reaction of cyclometalated halide-bridged Pd(II) complexes 1−4 with the tertiary triphosphine ligand (Ph2PCH2CH2)2PPh (triphos) yielded complexes [{(Ph2PCH2CH2)2PPh-P,P,P}Pd{N(Cy)=(H)C}C6H2{C(H)N(Cy)}Pd{(Ph2PCH2CH2)2PPh-P,P,P}][ClO4]2 5, [Pd{C6H4-NNC6H5}{(Ph2PCH2CH2)2PPh-P,P,P}][ClO4] 6, and [Pd{R-C6H3C(H)NCy}{(Ph2PCH2CH2)2PPh-P,P,P}][ClO4] (7; R = 4-CHO, 8; 3-CHO). Spectroscopic and analytic data suggest five-coordination on the palladium atom, which, for complexes 5, 6, and 7, was confirmed by X-ray crystallography. The geometry around palladium may be view as a distorted trigonal bipyramid, with the palladium, nitrogen, and terminal phosphorus atoms in the equatorial plane. Compound 5 is the first doubly cyclometalated palladium(II) compound with two pentacoordinated metal centers. The structure of 6 comprises two discrete cations with slightly different geometries, showing the importance of crystal packing forces in order to determine the coordination arrangement. |
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Bibliography: | ark:/67375/TPS-GBV4V5NX-7 istex:2CDF3C969262B74BD5B1224F9729BF26046A23BA ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0020-1669 1520-510X |
DOI: | 10.1021/ic001094g |