Abstract:Thiomethylation of the Metal–Carbon Multiple Bond of Carbyne and Carbene Complexes of Molybdenum and Tungsten
Carbyne complexes of molybdenum and tungsten react with dialkyl(methylthio)sulfonium tetrafluoroborate in a stepwise addition of the alkylthio cation to the metal–carbon multiple bond yielding dicationic η3‐dithiomethyl complexes.
“…The huge amount of acyclic carbene complexes is accompanied by only a few examples with a cyclic structure, as in (η 5 -C 5 H 5 )(CO) 2 - n (PMe 3 ) n MC(R)NNN(CH 2 ) n COOR (M = Mo, W; R = alkyl, aryl; n = 0, 1) − sulfur, − selenium, and tellurium 9 even smaller ring systems could be formed. 1 Well-known cyclic transition-metal carbene complexes. …”
The reaction of the carbyne complexes
(η5-C5H5)(CO)2W⋮CR
(R = Me, Ph, Tol) with
chlorodiphenylarsine, Ph2AsCl, provides in the
presence of thallium hexafluorophosphate
the novel cationic η2-arsinocarbene complexes
[(η5-C5H5)(CO)2WC(R)AsPh2][PF6]
(2a
−
c)
in high yields. The constitution of the new
tungstaarsacyclopropene complexes was
determined by spectroscopic investigation and, in the case of the
4-methylphenyl-substituted
compound 2c, additionally by X-ray single-crystal structure
determination.
“…The huge amount of acyclic carbene complexes is accompanied by only a few examples with a cyclic structure, as in (η 5 -C 5 H 5 )(CO) 2 - n (PMe 3 ) n MC(R)NNN(CH 2 ) n COOR (M = Mo, W; R = alkyl, aryl; n = 0, 1) − sulfur, − selenium, and tellurium 9 even smaller ring systems could be formed. 1 Well-known cyclic transition-metal carbene complexes. …”
The reaction of the carbyne complexes
(η5-C5H5)(CO)2W⋮CR
(R = Me, Ph, Tol) with
chlorodiphenylarsine, Ph2AsCl, provides in the
presence of thallium hexafluorophosphate
the novel cationic η2-arsinocarbene complexes
[(η5-C5H5)(CO)2WC(R)AsPh2][PF6]
(2a
−
c)
in high yields. The constitution of the new
tungstaarsacyclopropene complexes was
determined by spectroscopic investigation and, in the case of the
4-methylphenyl-substituted
compound 2c, additionally by X-ray single-crystal structure
determination.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
