1994
DOI: 10.1016/0022-328x(94)87203-1
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Zum reaktionsverhalten eines vinylidentitanocen-intermediates gegenüber protischen agenzien—selektive synthesen von 1-alkenyltitanocenverbindungen

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Cited by 50 publications
(24 citation statements)
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“…Activation of the CH 3 groups is found to take place in only one of the pentamethylcyclopentadienyl ligands, with the exception of 6, where the activation effects both of the Cp* ligands. This observed preference is in agreement with the existence of bis-complexes, [Cp*{C 5 Me 3 (CH 2 ) 2 }MH 2 ], [11,14,15] which are formed instead of hypothetical bis(tetramethylfulvene) complexes, [{C 5 Me 4 (CH 2 )} 2 MH 2 ]. All products obtained represent examples of functionalization of the Cp* groups.…”
Section: Resultssupporting
confidence: 86%
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“…Activation of the CH 3 groups is found to take place in only one of the pentamethylcyclopentadienyl ligands, with the exception of 6, where the activation effects both of the Cp* ligands. This observed preference is in agreement with the existence of bis-complexes, [Cp*{C 5 Me 3 (CH 2 ) 2 }MH 2 ], [11,14,15] which are formed instead of hypothetical bis(tetramethylfulvene) complexes, [{C 5 Me 4 (CH 2 )} 2 MH 2 ]. All products obtained represent examples of functionalization of the Cp* groups.…”
Section: Resultssupporting
confidence: 86%
“…Both of the above possible reactions seem rather unlikely, because tetramethylfulvene complexes have never been shown to insert internal alkynes. [28] The same holds true for the reactions of permethyltitanocene and -zirconocene with internal [29,30,31] and terminal [32] alkynes, as well as acetylene [33] , where no coupling with the Cp* ligand was observed.…”
Section: Resultsmentioning
confidence: 66%
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“…Titanocene(IV) complexes with a trifluoromethanesulfonate ligand in a 1 -binding mode have been described by Beckhaus et al (1994); Taw et al (2003); Deacon et al (2006); Kessler et al (2011) and Godemann et al (2015). The crystal structure of complex 2 also shows the trifluoromethanesulfonate ligand in a 1 -binding mode with a Ti1-O1 distance of 2.0605 (11) Å , which is slightly shorter compared to the bis(pentamethylcyclopentadienyl) compound Cp* 2 Ti(Cl)-(OTf) [2.097 (4) Å ; Beckhaus et al, 1994]. The value for the Ti1-Cl1 bond length [2.3255 (5) Å ] is in the expected range for a Ti IV -chloride bond and is the same as found for the above Cp* complex [2.328 (2) Å ].…”
Section: Structural Commentarymentioning
confidence: 99%
“…Generally, pentafulvene complexes of early transition metals are available by thermolysis of methyl substituted cyclopentadienyl derivatives [28][29][30][31][32][33][34][35][36][37][38]. On the other hand, free pentafulvenes are often used as starting materials in a direct [39,40] or indirect way [41,42] for the preparation of ansa-metallocenes, as well as heteroatom substituted r-p chelating systems [43,44].…”
Section: Introductionmentioning
confidence: 99%