@article {4865,
	title = {Synthesis, structure and magnetic properties of a chromium(III)-nicotinamide complex [Cr3O(O2CCH3)(6)(na)(3)](+) (na = nicotinamide)},
	journal = {Inorganica Chimica Acta},
	volume = {297},
	number = {1-2},
	year = {2000},
	note = {ISI Document Delivery No.: 277TNTimes Cited: 16Cited Reference Count: 20},
	month = {Jan},
	pages = {1-5},
	type = {Article},
	abstract = {The reaction between [Cr3O(O2CCH3)(7)(H2O)] ({\textquoteright}basic chromium acetate{\textquoteright}) and an excess of nicotinamide (na) at 120 degrees C, followed by dissolution of the mixture in water and addition of PF6-, led to the isolation of the first Cr(III)-nicotinamide complex [Cr3O(O2CCH3)(6)(na)(3)](+) (1). Crystals of the compound 1 . PF6. 3CH(3)CN were subjected to a detailed X-ray structural analysis. The three N-bonded na ligands, which occupy axial positions at the corners of the triangular basic chromium acetate, are nearly co-planar with the Cr3O system. The three Cr-N(na) bond distances are in the range 2.121(8)-2.128(8) Angstrom. Two of the na ligands on each cluster form four hydrogen bonds with two ligands from a neighboring cluster, via their amide ends with N...O distances of 2.88(1)-2.92(1) Angstrom. Magnetic susceptibility measurements of a powdered sample of 1 . PF6. 3CH(3)CN over the range 2-300 K showed that the three Cr(III) ions were antiferromagnetically coupled with J -10.4 cm(-1). There was no evidence for intermolecular magnetic exchange between the two Cr3O centers which are connected via hydrogen bonds. (C) 2000 Elsevier Science S.A. All rights reserved.},
	keywords = {CHROMIUM, CHROMIUM COMPLEXES, crystal structures, GLUCOSE-TOLERANCE FACTOR, MAGNETIC PROPERTIES, nicotinamide complexes},
	isbn = {0020-1693},
	url = {<Go to ISI>://000084949800002},
	author = {Lieberman, R. L. and Bino, A. and Mirsky, N. and Summers, D. A. and Thompson, R. C.}
}
@article {3644,
	title = {Benzynechromium tricarbonyl. Further synthetic studies},
	journal = {Inorganica Chimica Acta},
	volume = {251},
	number = {1-2},
	year = {1996},
	note = {ISI Document Delivery No.: VX967Times Cited: 5Cited Reference Count: 21},
	month = {Oct},
	pages = {53-64},
	type = {Article},
	abstract = {{The thermolysis of Ru-3(CO)(11)[Ph(2)PC(6)H(5)Cr(CO)(3)] affords two isomers of the benzyne derivative Ru-3(CO)(7)(C6H4)[PPhC(6)H(5)Cr(CO)(3)](2) ((5) and (6)). The crystal structure of 5, previously determined, shows the phenyl groups are trans to the Ru-3-triangle; in 6 they are probably cis and on the same side of the Ru-3-triangle as the benzyne moiety. Os-3(CO)(11)[Ph(2)PC(6)H(5)Cr(CO)(3)] decomposes on heating to afford a benzyne derivative of a less common class Os-3(CO)(9)(C6H4)[PC6H5Cr(CO)(3)] (7), and an electron deficient molecule Os-3(CO)(8)(PhPC(6)H(4))[Ph(2)PC(6)H(5)Cr(CO)(3)] (8), in which the PhPC(6)H(4) moiety acts as a four-electron donor. The isopropylphosphine derivatives M(3)(CO)(11)[(Pr2PC6H5Cr)-P-i(CO)(3)] (M=Ru, Os), also undergo thermolysis to afford HRu3(CO)(8)[C6H4Cr(CO)(3)](PPr2i) (10), Ru(CO)(3)[(Pr2PC6H5Cr)-P-i(CO)(3)](2) (11), H2Os3(CO)(8)[(PrPC6H4Cr)-P-i(CO)(3)] (12) and H2Os3(CO)(8)[(PrPC6H4Cr)-P-i(CO)(3)][(Pr2PC6H5Cr)-P-i(CO)(3)] (13). Complex 10 is probably a benzynechromium tricarbonyl derivative with a Cr-Ru bond. The phosphines are trans in complex 11, a derivative of Ru(CO)(5). The structures of complexes 12 and 13 are closely related and the orthometalated [PC6H4Cr(CO)(3)] moiety is acting as a four-electron donor to the cluster. Crystal data: for 8 (C41H24CrO11Os3P2 . CH2Cl2): monoclinic},
	keywords = {(BENZYNE)CHROMIUM TRICARBONYL, BENZYNE, carbonyl complexes, CHROMIUM COMPLEXES, cluster complexes, CLUSTERS, COMPLEXES, crystal structures, CRYSTAL-STRUCTURES, MOLECULAR-STRUCTURES, OSMIUM, osmium complexes, ruthenium complexes},
	isbn = {0020-1693},
	url = {<Go to ISI>://A1996VX96700009},
	author = {Cullen, W. R. and Rettig, S. J. and Zhang, H. L.}
}
