Read e-book online Advances in Inorganic Chemistry, Vol. 52 PDF

By AG Sykes

ISBN-10: 0120236524

ISBN-13: 9780120236527

Advances in Inorganic Chemistry provides well timed and informative summaries of the present growth in numerous topic components inside inorganic chemistry, starting from bioinorganic to stable country. This acclaimed serial good points studies written via specialists within the quarter and is an quintessential connection with complicated researchers. each one quantity of Advances in Inorganic Chemistry includes an index, and every bankruptcy is totally referenced.

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The synthetic procedure is quite different, involving addition of NEt4C1 to a tetranuclear manganese(III) butterfly, [Mn402(O2CMe)6(py)2(dbm)2] in CH2C12. This transformation is both solvent-dependent and difficult to rationalize; in MeCN, the same reaction gives [Mn403Cl(O2CMe)3(dbm)3] (91). Magnetic measurements indicate that 30 has a complicated spin structure, and it was not possible to conclude whether the ground state was S = 3 or S = 4 based on preliminary magnetization studies. A heptanuclear manganese(II) cage, [Mn706(OEt)ls(HOEt)2], has also been crystallized from the reaction of anhydrous MnC12 with NaSb(OEt)4 by controlled hydrolysis in toluene-ethanol (92).

A tridecanuclear cage, [Mn13Os(OEt)6(O2CPh)12] (49), has perhaps the most appealing structure (121), which is shown in Fig. 19. It is a supercubane, containing Mr i n Fro. 19. The structure of [Mn13Os(OEt)6(O2CPh)12] (121),with phenyl groups excluded for clarity. ) 46 WINPENNY eight cubanes arranged in a cube. The central manganese site is a Mn(IV) center, and is shared by all eight cubanes. The 12 surrounding Mn centers are half Mn(III) and half Mn(II), and can be assigned because the Mn(III) sites show a Jahn-Teller elongated coordination geometry.

Clearly the alkali metal is templating the formation of one cage rather than the other. With N-methyldiethanolamine, reaction with FeC13 in T H F in the presence of Cs2CO3 leads to an empty cage, [Fe6C16{OCH2CH2)2NMe}6] (140), with bridging between Fe centers similar to that in 56, but with six terminal chloride ligands attached to the six Fe sites. Use of a bis(bipyridine) ligand has also generated a hexanuclear iron(III) cage, [Fe604C14(O2CPh)4(L6)2] 2+ (141), where L6 = 1,2-bis(2,2'bipyridyl-6-yl)ethane.

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Advances in Inorganic Chemistry, Vol. 52 by AG Sykes

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