Advances in Organometallic Chemistry, Vol. 29 by F.G.A. Stone, Robert West (Eds.)

By F.G.A. Stone, Robert West (Eds.)

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Extra resources for Advances in Organometallic Chemistry, Vol. 29

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202 [W(CO)(PhC=CPh)(MeCN)I,], u(CO)," cm-' Ref. 2010 2075. 2000 1675* 2050. 200s 4Y 51 51 1690 51 204s. I990 I620 ' I978 2060. IYhIJ 167S* Mo(CO)(PhC=CPh)( MeCN),I, W(CO),( HOC=CC,H,Me)(acac)CI 51 100 (W=CHPh)(PhC=CPh)(PMe3),CIZ [W(CNBu'),(RHNC=CNHR)I]I 223 I82 [Mo(CNBu'),( Bu'HNC=CNHBu')l]I 193 [Mo(CNBu'),(Bu'HNC=CNHBu')Br] . ](CO)( PEt,)W( MeOC=CSMe)}[FSO,] 23 1 . NC=CMe)( S,CNMe,): 1920 1908 217 218 W(CO)(PhC=CPh)(S,CNEt2)2 W(CO)(HOCH2C=CCHZOH)(S,CNEt2)2 W(C0)(Et,NC=CMe)(SZCNEt,), W(CO)(MeC=CMe)(S2CNEt,), W(CO)(E tC=CEt)(S,CNEt,), W(CO)(DMAC)(S,CNEtz): W(CO)(r-cyclooctyne)(S2CNEt2), W(CO)( r-cyclooctyne)( S2CNMeJ2 214 21s W(CO)(Ph2PC=CPPh2)(S2CNEt2), W(CO)(PhC=COMe)( C,H,N2)?

Although trans-dicarbonyl fragments are relatively rare, this reflects the dominance of d octahedral complexes where wacid ligands indeed attempt to avoid a trans disposition. Octahedral d 4 dicarbonyl complexes are in fact ideal for mutual trans carbonyl placement, much like d 2 M02 complexes are trans while the more common d o MOz fragments are cis (131). Trans CO ligands stabilize both d,, and dyz to create the two-below-one dw orbital splitting which is required for diamagnetic d4 octahedra.

IYhIJ 167S* Mo(CO)(PhC=CPh)( MeCN),I, W(CO),( HOC=CC,H,Me)(acac)CI 51 100 (W=CHPh)(PhC=CPh)(PMe3),CIZ [W(CNBu'),(RHNC=CNHR)I]I 223 I82 [Mo(CNBu'),( Bu'HNC=CNHBu')l]I 193 [Mo(CNBu'),(Bu'HNC=CNHBu')Br] . ](CO)( PEt,)W( MeOC=CSMe)}[FSO,] 23 1 . NC=CMe)( S,CNMe,): 1920 1908 217 218 W(CO)(PhC=CPh)(S,CNEt2)2 W(CO)(HOCH2C=CCHZOH)(S,CNEt2)2 W(C0)(Et,NC=CMe)(SZCNEt,), W(CO)(MeC=CMe)(S2CNEt,), W(CO)(E tC=CEt)(S,CNEt,), W(CO)(DMAC)(S,CNEtz): W(CO)(r-cyclooctyne)(S2CNEt2), W(CO)( r-cyclooctyne)( S2CNMeJ2 214 21s W(CO)(Ph2PC=CPPh2)(S2CNEt2), W(CO)(PhC=COMe)( C,H,N2)?

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