An infrared spectroscopic investigation of the interaction between vanadium oxychloride and organoaluminum compounds

Matkovskii, P. E.; Chirkov, N.M.; Leonov, I. D.; Beikhol'd, G.A.; Pomogaĭlo, A. D.

doi:10.1007/bf00607999

Cited by 1 publication

(2 citation statements)

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“…From the IR spectrogram ( Figure 6) before and after the reaction of VO(OR) 2 Cl with AliBu 3 , it is evident that the reaction product of Al-V has a spectral band at 910-935 cm-1 corresponding to the vibration of the Al-0-V bond. 8 The new spectral band appearing at about 600 em -l also corresponds to the characteristic peak of the Al-0 bond. 10 The characteristic spectral band representing the vibration of the V-Cl bond at 450cm-1 shows no change from before to after the reaction/ 1 so that the V-Cl band is still present.…”

Section: Formation Of the Active Centermentioning

confidence: 92%

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Studies on the Mechanism of Butadiene–Propene Alternating Copolymerization Using the VO[OCH2C(CH3)3]2Cl–AliBu3 Catalyst

Jiao

Dingshing

1985

Polym J

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The average valence of the vanadium ion in VO[OCH2C(CH3hlzCl-AliBu3 reaction product was measured by a potentiometric method. The number of active centers at-30-80°C was measured by kinetic extrapolation. The active center was assumed to be mainly v+'. By analysis of theIR spectrum of reaction product of two catalyst components, the Al-0-V, Al-0, and V-Cl bonds were confirmed. Probably the active center was v+ 3 having a regular octahedral structure with Al-Cl-V and Al-0-V bridge bonds. Electron donation from butadiene to v+ 3 makes possible a complex formation between them and chain initiation. The propagation is considered to be controlled by coordinating site, a transfer to the monomer was found to be the dominating factor for termination reaction at-30 to-60°C.

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Section: Formation Of the Active Centermentioning

confidence: 92%

“…The reaction between chlorovanadate and triisobutylaluminium and the formation process of the active center has so far not appeared in the literature. Since the active center was found to be v+ 3 and on the basis of the results of Matkovskii, 8 Keirn et a/. 9 follows:…”

Section: Formation Of the Active Centermentioning

confidence: 98%

Studies on the Mechanism of Butadiene–Propene Alternating Copolymerization Using the VO[OCH2C(CH3)3]2Cl–AliBu3 Catalyst

Jiao

Dingshing

1985

Polym J

View full text Add to dashboard Cite

show abstract

An infrared spectroscopic investigation of the interaction between vanadium oxychloride and organoaluminum compounds

Cited by 1 publication

References 3 publications

Studies on the Mechanism of Butadiene–Propene Alternating Copolymerization Using the VO[OCH2C(CH3)3]2Cl–AliBu3 Catalyst

Studies on the Mechanism of Butadiene–Propene Alternating Copolymerization Using the VO[OCH2C(CH3)3]2Cl–AliBu3 Catalyst

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