83801-30-3Relevant academic research and scientific papers
Synthesis and reactivity of the α,β-unstaturated carbene tungsten complex (CO)5W
Macomber, David W.,Liang, Mong,Madhukar, Puttannachetty,Verma, Akhilkumar G.
, p. 187 - 196 (1989)
Treatment of W(CO)6 with vinyllithium followed by Me3OBF4 in the presence of H2O produced (CO)5W (1) (25-30percent) and (CO)5W2-CH=CH2)>W(CO)5 (2) 20-30percent.Complex 1 reacted with (CO)5W*THF to giwe W2(CO)91,η3-C(OCH3)CH=CH2> (3) (61percent).Heating (2) to 45 deg C in toluene produced 3 (65percent) which could be converted back to 2 upon treatment with CO.Complex 1 reacted with D2O in benzene-d6 to afford 2 and methyl propionate-2,3-d2 (4).A new route to 1 was developed from W(CO)6 in an overall yield of 40percent using (CO)5WNMe4 (8) as an intemediate.
SYNTHESIS AND X-RAY STRUCTURES OF SOME HOMONUCLEAR μ-ALKYLIDENETUNGSTEN COMPLEXES
Parlier, A.,Rudler, M.,Rudler, H.,Daran, J. C.
, p. 353 - 370 (2007/10/02)
The complexes W2> and W2> have been synthesized, and an X-ray diffraction study has revealed the presence of five CO groups on each metal center.The analogy between W2> and a complex of W(CO)4 and a tungstabutadiene (CO)5W=CHCH=C(CH3)2 prompted the synthesis of the first heteroatom-substituted μ-alkylidene complexes of tungsten, starting from conjugated Fischer-type carbene complexes (CO)5W=C(OR)CH=CHR.The X-ray structure of the complex W2> has also been determined.In the case of the simplest conjugated complex (CO)5W=C(OR)CH=CH2, an interesting rearrangement initiated by addition of W(CO)5 to the terminal C=C double bond giving a dinuclear complex W(CO)52-CH2=CHC(OMe)W(CO)5> in which the two metal centers are not directly linked, has been observed.
