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Organometallic Chemistry in a Conventional Microwave Oven: the Facile Synthesis of Group 6 Carbonyl Complexes by Michael Ardon; Graeme Hogarth; Daniel T.W Oscroft is a Chemistry article available to read on EtoBox.

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Syntheses proceeding by reflux may be improved, accelerated and simplified, by carrying out the reaction in a modified conventional microwave oven. To demonstrate the potential of this method, the synthesis of over 20 group 6 organometallic compounds is reported. Hexacarbonyls, most notably Mo(CO) 6 , react with a range of mono, and bi, and tridentate ligands in a modified conventional microwave oven. They generally proceed without an inert atmosphere, yields are high and reaction times are short. For example, cis-[Mo(CO) 4 (dppe)] is prepared in >95% yield in 20 min. Reaction of Mo(CO) 6 with dicyclopentadiene affords a simple one-step synthesis of [CpMo(CO) 3 ] 2 in >90% yield, which reacts further with alkynes in toluene to produce dimetallatetrahedrane derivatives, [Cp 2 Mo 2 (CO) 4 (l-RC 2 R)]; presumably via the in situ formation of air-sensitive [CpMo(CO) 2 ] 2 . Dimolybdenum tetraacetate is also prepared in 48% yield in 45 min, however, this reaction requires an inert atmosphere. While W(CO) 6 reacts rapidly with amines to give cis diamine adducts in high yields, direct reactions with phosphines are not so clean. Bis(phosphine) complexes are, however, cleanly formed when a

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Author

Michael Ardon; Graeme Hogarth; Daniel T.W Oscroft

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-328X)

Published

2004

Language

EN

Field

Chemistry (Physical Sciences)