One-electron oxidation of paramagnetic chromium(II) alkyl complexes with alkyl halides: synthesis and structure of five-coordinate chromium(III) complexes

Fryzuk, Michael D.; Leznoff, Daniel B.; Rettig, Steven J.

doi:10.1039/a806099a

Cited by 40 publications

(44 citation statements)

References 52 publications

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“…However, the non-metallocene catalysts include the chromium(III) complexes with monoanionic ligands a with moderate or high catalytic activity e.g. the bis(phosphino)amide complex of chromium(III) with the activity equal 500 g∙mmol −1 ∙h −1 ∙bar −1 7 , 8 , the chromium(III) complex with triptycenyl and 2-pyridylmethyl exhibits the 6970 g∙mmol −1 ∙h −1 ∙bar −1 catalytic activity 1 . The chromium(III) complexes with pyrrole–imino-amine/ether pro-ligands {ENN R }H (E = NH, R = H, 1a; E = NH, R = tBu, 1b; E = O, R = H, 1c) have a very high catalytic activity for the ethylene polymerization 9 .…”

Section: Introductionmentioning

confidence: 99%

Oligomerization of 2-chloroallyl alcohol by 2-pyridinecarboxylate complex of chromium(III) - new highly active and selective catalyst

Drzeżdżon

Sikorski

Chmurzyński

et al. 2018

Sci Rep

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The new 2-pyridinecarboxylate (2-pic) complex of chromium(III) has been designed and synthesized as a new highly active and selective oligomerization catalyst. The crystal structure of the new compound has been determined by X-ray diffraction. The composition and purity of [Cr(2-pic)2(OH2)2]NO3 have been confirmed by several spectroscopic methods and the elemental analysis. Furthermore, the new complex has been investigated towards its catalytic activity for the oligomerization of 2-chloro-2-propen-1-ol under the atmospheric pressure and at room temperature. It has turned out that the novel catalyst exhibits a very high catalytic activity. Consequently, [Cr(2-pic)2(OH2)2]NO3 belongs to a new generation of non-metallocene catalysts.

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Section: Introductionmentioning

confidence: 99%

Oligomerization of 2-chloroallyl alcohol by 2-pyridinecarboxylate complex of chromium(III) - new highly active and selective catalyst

Drzeżdżon

Sikorski

Chmurzyński

et al. 2018

Sci Rep

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“…25 but this is not an active ethene polymerisation catalyst. 26 It has also been reported that alkylchromium complexes of the type RCrCl 2 (THF) 3 (R = Me, Et, i Bu) polymerise ethene at room temperature, but no details were given.…”

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confidence: 99%

Transition metal complexes of triphosphorus macrocycles: A new class of homogeneous olefin polymerisation catalysts

Baker

Edwards

2002

J. Chem. Soc., Dalton Trans.

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Some early transition metal (Ti, V, Cr) complexes of the triphosphorus macrocycle 1,5,9-triethyl-1,5,9-triphosphacyclododecane, [12]aneP 3 Et 3 , and related derivatives [12]aneP 3 R 3 (R = Ph, C 3 H 6 OMe) have been examined for their reactivity towards ethene and propene. All complexes of the type [12]aneP 3 Et 3 MCl 3 display moderate catalytic activity in the homogeneous polymerisation of ethene when combined with an alkyl aluminium co-catalyst to give very high molecular weight polymers. Preliminary activation of chromium complexes with alkylating agents was also studied but these were inactive in the absence of a co-catalyst. Substitution of the P-borne alkyl group with a pendant ether function was found to switch the catalytic activity of chromium() complexes from polymerisation to oligomerisation. A nickel halide complex of [12]aneP 3 Et 3 was also found to be active in alkene polymerisation.

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“…11, examples of 5-coordinated complexes 50-58 based on other tridentate ligands that were not mentioned earlier are illustrated [144][145][146][147][148][149][150][151][152]. The aluminum complexes of monoanionic tridentate ligands 50 and 58 with B(C 6 F 5 ) 3 are active for ethylene polymerization with a very low activity [144,152].…”

Section: Other Tridentate Ligandsmentioning

confidence: 96%

Non-Cp type homogeneous catalytic systems for olefin polymerization

Park

Han

Kim

et al. 2004

Journal of Organometallic Chemistry

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One-electron oxidation of paramagnetic chromium(II) alkyl complexes with alkyl halides: synthesis and structure of five-coordinate chromium(III) complexes

Cited by 40 publications

References 52 publications

Oligomerization of 2-chloroallyl alcohol by 2-pyridinecarboxylate complex of chromium(III) - new highly active and selective catalyst

Oligomerization of 2-chloroallyl alcohol by 2-pyridinecarboxylate complex of chromium(III) - new highly active and selective catalyst

Transition metal complexes of triphosphorus macrocycles: A new class of homogeneous olefin polymerisation catalysts

Non-Cp type homogeneous catalytic systems for olefin polymerization

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