Mixed-Sandwich η5/η7 Vanadium Complexes. The Molecular Structure of (η5-2-Methyl-indenyl)-(η7-cycloheptatrienyl)-vanadium

1999 ◽  
Vol 54 (7) ◽  
pp. 899-903 ◽  
Author(s):  
Max Herberhold ◽  
Silke Köppl ◽  
Wolfgang Milius
Keyword(s):  
Molecular Structure ◽  
Vanadium Complexes ◽  
Cyclopentadienyl Ligand

The diamagnetic halfsandwich complexes [V(η7-C7H7)(CO)3] and [V(η5-L5)(CO)4] have been used as intermediates in the conversion of hexcarbonylvanadium, V(CO)6, to the paramagnetic trovacene derivatives, [V(η5-L5)(η7-C7H7)] [L5 = cyclopentadienyl ligand, C5H4-R (R = H (1), Me (1a), tBu (1b)) and C5Me5 (1c); indenyl (2) and 2-methylindenyl (2a)]. The molecular structure of 2a has been determined: the distances between vanadium and the center Z of the (nearly parallel) ring ligands are 193.0 pm (V-Z5) and 146.2 pm (V-Z7).

Vanadiumkomplexe mit dreizähnigen diaciden Liganden. Bis[2-(2′-hydroxyphenyl)-chinolin-8-olato]dimethoxo-dioxo-divanadium(V) -ein neuer Strukturtyp/Vanadium Complexes with Tridentate Diacidic Ligands. Bis[2-(2′-hydroxyphenyl)-8-quinolinolato)dimethoxo-dioxo-divanadium (V) - a New Structure Type

1997 ◽  
Vol 52 (6) ◽  
pp. 693-695 ◽  
Author(s):  
Heike Hefele ◽  
Erhard Uhlemann ◽  
Frank Weller
Keyword(s):  
Molecular Structure ◽  
Structure Analysis ◽  
Sulfate Solution ◽  
Structure Type ◽  
Vanadium Complexes ◽  
Crystal Data ◽  
Space Group ◽  
X Ray

A new binuclear vanadium( V) complex was synthesized by reaction of an aqueous oxovanadium(IV) sulfate solution with 2-(2′-hydroxyphenyl)-8-quinolinol dissolved in methanol. The molecular structure of the complex was determined by X-ray structure analysis. Crystal data: a = 10.004(3), b = 9.325(2), c = 15.089(3) Å; β = 91.95(2)°; space group P21/n, Z = 4.

Mono and oligonuclear vanadium complexes as catalysts for alkane oxidation: synthesis, molecular structure, and catalytic potential

2004 ◽  
Vol 357 (2) ◽  
pp. 475-484 ◽  
Author(s):  
Georg Süss-Fink ◽  
Laura Gonzalez Cuervo ◽  
Bruno Therrien ◽  
Helen Stoeckli-Evans ◽  
Georgiy B Shul’pin
Keyword(s):  
Molecular Structure ◽  
Alkane Oxidation ◽  
Vanadium Complexes ◽  
Catalytic Potential ◽  
Oxidation Synthesis

Synthesis and Crystal Structures of Dimethylsilylene-Bridged (Amidocyclopentadienyl)dichlorotitanium(IV) Complexes with Various Substituents on the Cyclopentadienyl Ligand

2001 ◽  
Vol 66 (4) ◽  
pp. 605-620 ◽  
Author(s):  
Jaroslav Zemánek ◽  
Petr Štěpnička ◽  
Karla Fejfarová ◽  
Róbert Gyepes ◽  
Ivana Císařová ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Solid State ◽  
Single Crystal ◽  
Spectral Methods ◽  
Nmr Spectra ◽  
Bulky Substituent ◽  
State Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cyclopentadienyl Ligand

(Amidocyclopentadienyl)dichlorotitanium(IV) complexes of the general formula [TiCl2{η5:η1(N)-C5(1-SiMe2Nt-Bu-2,3,4-Me3-5-R)}], where R = H (6b), Ph (6c), 4-fluorophenyl (6d) and 1-methylallyl (6e) were synthesized and characterized by spectral methods. Solid-state structure of [TiCl2{η5:η1(N)-C5Me4(SiMe2Nt-Bu)}] (6a) and 6d determined by single-crystal X-ray diffraction showed that variation of the ring substituent R has only a negligible effect on the molecular structure of the complexes. The NMR spectra indicate that motion of the bulky substituent R in compounds 6c, 6d and 6e is hindered below ca 50 °C.

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