1973
DOI: 10.1016/s0022-328x(00)85011-1
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The crystal and molecular structure of oxo-π-cyclopentadienylπ-diphenylacetylene-σ-phenyltungsten

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Cited by 49 publications
(12 citation statements)
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“…A more obvious difference is the reorientation of the alkyne ligand so that it is now perpendicular to the MoO bond: i.e., it has rotated by 90° in comparison to its position in the carbonyl complex 3 , due to competition for the available metal d orbitals with the strong π-donor oxo ligand. The same reorientation of the alkyne ligand was shown to have taken place in the X-ray crystal structures of two related complexes, [Mo­(CO)­(SC 6 F 5 )­(F 3 CCCCF 3 )­(η-C 5 H 5 )] and [Mo­(O)­(SC 6 F 5 )­(F 3 CCCCF 3 )­(η-C 5 H 5 )], and the alkyne in [W­(O)­(Ph)­(PhCCPh)­(η-C 5 H 5 )] also adopts the same geometry …”
Section: Resultsmentioning
confidence: 62%
“…A more obvious difference is the reorientation of the alkyne ligand so that it is now perpendicular to the MoO bond: i.e., it has rotated by 90° in comparison to its position in the carbonyl complex 3 , due to competition for the available metal d orbitals with the strong π-donor oxo ligand. The same reorientation of the alkyne ligand was shown to have taken place in the X-ray crystal structures of two related complexes, [Mo­(CO)­(SC 6 F 5 )­(F 3 CCCCF 3 )­(η-C 5 H 5 )] and [Mo­(O)­(SC 6 F 5 )­(F 3 CCCCF 3 )­(η-C 5 H 5 )], and the alkyne in [W­(O)­(Ph)­(PhCCPh)­(η-C 5 H 5 )] also adopts the same geometry …”
Section: Resultsmentioning
confidence: 62%
“…688 Brought [216,220], frans-1,4-dimethyl-1,2,4,5-tetraphenyl-3,6-bis(trimethylsilyl)-1,4-disilacyclohexa-2,5-diene 131 [218] and frans-1,2,3,4,5,6-hexamethyl-1,4-bis(trimethylsilyl)-1,4-disilacyclohexa-2,5-diene 132 [219] has a nearly planar conformation with a slight deformation towards a chair form. Unlike all above-mentioned 1,4-disilacyclohexa-2,5-dienes the molecules of the c/'s-isomer 132 [219] and 1,1,4-trimethyl-3,6-diphenyl-2,4,5-tris(trimethylsilyl)-1,4-disilacyclohexa-2,5-diene 133 [217] are distorted from planarity to yield a boat conformation with silicon atoms deviating from the plane by 0.…”
Section: Me2 1 R Imentioning
confidence: 99%
“…Mit vier äquatorialen Chlor-Liganden, mit der 0 _C-Gruppe des "side-on" gebundenen 2,2,5, 5-Tetramethylhex-3-ins und mit dem hierzu in trans-Position angeordneten Sauerstoffatom des solvatisierenden POOla-Moleküls ist das Wolframatom siebenfach koordiniert. Es besitzt die Oxydationszahl (+IV) und stellt damit neben dem Diphenylacetylen-Komplex [HSC6-WO(n5-0sHIj)(Hs06-C=C-CaHs)] [11], in dem man deni Zentralatom formal ebenfalls die Oxydationszahl (+IV) zuschreiben kann, die Realisierung der.bisher höchsten Oxydationsstufe eines Übergangsmetalls in einem Acetylenkomplex dar [5,6]. Tabelle 2 enthält einige Wolframkomplexe zum Vergleich.…”
Section: Kristallstruktur Von [(01apo)w014(h904-c=0-c4h9)]unclassified