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1271-24-5

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A facile access to CpCr (acac)Cl and related systems
CpCr(acac)Cl has been prepared by reacting CpCr(THF)Cl2 with sodium acetylacetonate. Related Cr compounds containing the C5Me5 group and ethylacetoacetate have also been studied. Catalysts active for the polymerization of ethylene are obtained by treating these compounds with aluminium alkyls while the title compound reacts with Et2AlCl or Et3Al to give [CpCr(μ-Cl)Et]2.
Heinemann, Oliver,Jolly, Peter W.,Krueger, Carl,Verhovnik, Glenn P.J.
p. 477 - 479
(1998)
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η5-Cyclopentadienyl and η5-Methylcyclopentadienyl 1,2-Bis(dimethylphosphino)ethane Complexes of Titanium(II). The Crystal Structure of Ti(C5H4Me)2(dmpe)
The interaction of the titanium(II) complex trans-TiCl2(dmpe)2 with 2 equivalents of Na(C5H5) or Na(C5H4Me) in diethyl ether gives the dark orange cyclopentadienyl compounds Ti(C5H4R)2(dmpe) (R=H or Me, dmpe=Me2PCH2CH2PMe2).These diamagnetic 18-electron species give n.m.r. spectra consistent with a bent metallocene structure, confirmed by X-ray structure analysis of Ti(C5H4Me)2(dmpe) for wich Ti-P 2.533(6) Angstroem (mean), Ti-C 2.310(5)-2.441(6) Angstroem P-Ti-P 76.9(2) deg, and centroid-Ti-centroid=135.3(2) deg.The cyclopentadienyl rings are very slightly tilted towards the dmpe ligand due to non-bonding contacts between the ring-boundmethyl groups.
Girolami, Gregory S.,Wilkinson, Geoffrey,Thornton-Pett, Mark,Hursthouse, Michael B.
p. 2347 - 2350
(1984)
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Ein μ2-Benzylidenkomplex des Chroms mit ungepaarten Elektronen
The benzylidene-bridged dichromium complex 2(μ-Br)2(μ-CHC6H5) (4) has been obtained by thermolysis of 2(μ-Br)2. 1H NMR spectroscopy shows that 4 is antiferromagnetic and a barier of 64.0 kJ mol-1 slows down the rotation of the phenyl group.
Koehler, F. H.,Krueger, C.,Zeh, H.
p. C13 - C15
(2007/10/02)

Evidence for a novel π-bonded aquoorganochromium(III) ion, (η5-C5H5)Cr(OH2) n2+
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Spreer, Larry O.,Shah, Ihsanullah
p. 4025 - 4027
(2008/10/08)

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Chemical Properties

Appearance/Colour :bordeaux crystalline powder
Melting Point: 172°C to 173°C
Boiling Point: 41.5 °C at 760 mmHg
Flash Point:°C
Density: g/cm³
Storage Temp.:Store below +30°C.
Vapor Pressure: 418mmHg at 25°C
Sensitive: Air & Moisture Sensitive
PSA: 0.00000
LogP: 2.04300

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