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Emeritus Professor Carl Redshaw's Outputs (426)

Methylaluminium 8-quinolinolates: Synthesis, characterization and use in ring-opening polymerization (ROP) of ε-caprolactone (2011)
Journal Article
Sun, W. H., Shen, M., Zhang, W., Huang, W., Liu, S., & Redshaw, C. (2011). Methylaluminium 8-quinolinolates: Synthesis, characterization and use in ring-opening polymerization (ROP) of ε-caprolactone. Dalton Transactions : an international journal of inorganic chemistry, 40(11), 2645-2653. https://doi.org/10.1039/c0dt01207f

The stoichiometric reactions of 2-(2,6-R-phenylimino)quinolin-8-ol (L1-L5, L1: R = Me, L2: R = Et, L3: R = iPr, L4: R = Cl, L5: R = F) with Me3Al afforded the dimeric aluminium complexes [Me 2AlL]2 (1-5) in good yields. By contrast, stoichiometric re... Read More about Methylaluminium 8-quinolinolates: Synthesis, characterization and use in ring-opening polymerization (ROP) of ε-caprolactone.

Synthesis, characterization and ethylene oligomerization behavior of 2-benzoimidazol-8-ethoxyquinolylnickel dihalides (2011)
Journal Article
Liu, H., Zhang, L., Chen, L., Redshaw, C., Li, Y., & Sun, W. H. (2011). Synthesis, characterization and ethylene oligomerization behavior of 2-benzoimidazol-8-ethoxyquinolylnickel dihalides. Dalton Transactions : an international journal of inorganic chemistry, 40(11), 2614-2621. https://doi.org/10.1039/c0dt01331e

A series of 2-benzoimidazol-8-ethoxyquinolines (L1-L6) and the nickel dihalides thereof (C1-C12) were synthesized and characterized by elemental analysis and infrared spectroscopy. The molecular structures of representative complexes were determined... Read More about Synthesis, characterization and ethylene oligomerization behavior of 2-benzoimidazol-8-ethoxyquinolylnickel dihalides.

Enhancement of H2 uptake via fluorination but not lithiation for Zn4N8 and Zn4N6O type clusters (2010)
Journal Article
Redshaw, C., Jana, S., Shang, C., Elsegood, M. R., Lu, X., & Guo, Z. X. (2010). Enhancement of H2 uptake via fluorination but not lithiation for Zn4N8 and Zn4N6O type clusters. Chemical communications : Chem comm / the Royal Society of Chemistry, 46(47), 9055-9057. https://doi.org/10.1039/c0cc03380d

The introduction of fluorinated aryls at zinc in Zn (and to a lesser extent Zn4N8-type4N6O) cages led to enhanced H2 uptake. Lithium alkoxides have been shown to link such cages (non-fluorinated), but showed no substantial improvement in uptake.

Multinuclear zinc pentafluorobenzene carboxylates: Synthesis, characterization, and hydrogen storage capability (2010)
Journal Article
Redshaw, C., Jana, S., Shang, C., Elsegood, M. R., Lu, X., & Guo, Z. X. (2010). Multinuclear zinc pentafluorobenzene carboxylates: Synthesis, characterization, and hydrogen storage capability. Organometallics, 29(22), 6129-6132. https://doi.org/10.1021/om100703c

Three zinc carboxylate complexes, [(C6F5Zn)4Zn(Ar1)6]·1.5toluene, [(C6F5Zn)4Zn(Ar2)6]·2toluene, and [(Ar3)6Zn4(μ4-O)]·MeCN (where Ar1 = 2-chlorobenzoic acid (1), Ar2 = 2,4,6-trimethylbenzoic acid (2), and Ar3 = 3-dimethylaminobenzoic acid (3)), have... Read More about Multinuclear zinc pentafluorobenzene carboxylates: Synthesis, characterization, and hydrogen storage capability.

Synthesis and characterisation of alkylaluminium benzimidazolates and their use in the ring-opening polymerisation of ε-caprolactone (2010)
Journal Article
Shen, M., Huang, W., Zhang, W., Hao, X., Sun, W. H., & Redshaw, C. (2010). Synthesis and characterisation of alkylaluminium benzimidazolates and their use in the ring-opening polymerisation of ε-caprolactone. Dalton Transactions : an international journal of inorganic chemistry, 39(41), 9912-9922. https://doi.org/10.1039/c0dt00514b

The stoichiometric reactions of 2-(benzimidazol-2-yl)-6-methylpyridine (L1) or 8-(benzimidazol-2-yl)quinaldine (L2) with trialkylaluminium reagents R 3Al (R = Me, Et and iBu) afforded the corresponding dialkylaluminium benzimidazolate complexes R2AlL... Read More about Synthesis and characterisation of alkylaluminium benzimidazolates and their use in the ring-opening polymerisation of ε-caprolactone.

Bimetallic copper(II) and zinc(II) complexes of acyclic Schiff base ligands derived from amino acids (2010)
Journal Article
Arbaoui, A., Redshaw, C., Sanchez-Ballester, N. M., Elsegood, M. R., & Hughes, D. L. (2011). Bimetallic copper(II) and zinc(II) complexes of acyclic Schiff base ligands derived from amino acids. Inorganica Chimica Acta, 365(1), 96-102. https://doi.org/10.1016/j.ica.2010.08.043

The acyclic Schiff-base ligands (2-(OH)-5-(R3)C 6H2-1,3-(HCNC(R1)(R2)CO 2H), derived from the dialdehyde 2-hydroxy-5-R-1,3- benzenedicarboxaldehyde (R = Me or t-Bu) and two equivalents of the amino acids glycine, 2,2-diphenylglycine or phenylalanine,... Read More about Bimetallic copper(II) and zinc(II) complexes of acyclic Schiff base ligands derived from amino acids.

Vanadium procatalysts bearing chelating aryloxides: Structure-activity trends in ethylene polymerisation (2010)
Journal Article
Redshaw, C. (2010). Vanadium procatalysts bearing chelating aryloxides: Structure-activity trends in ethylene polymerisation. Dalton Transactions : an international journal of inorganic chemistry, 39(24), 5595-5604. https://doi.org/10.1039/b924088h

High-valent vanadium complexes bearing a variety of chelating aryloxides including di- and linear tri-phenolates, C/N-capped tripods, phenoxyimines and calixarenes type ligands, when used in combination with dialkylaluminium halides as co-catalyst an... Read More about Vanadium procatalysts bearing chelating aryloxides: Structure-activity trends in ethylene polymerisation.

Iron(III) and Zinc(II) calixarene complexes: Synthesis, structural studies, and use as procatalysts for ε-caprolactone polymerization (2010)
Journal Article
Arbaoui, A., Redshaw, C., Elsegood, M. R. J., Wright, V. E., Yoshizawa, A., & Yamato, T. (2010). Iron(III) and Zinc(II) calixarene complexes: Synthesis, structural studies, and use as procatalysts for ε-caprolactone polymerization. Chemistry - An Asian Journal, 5(3), 621-633. https://doi.org/10.1002/asia.200900514

Treatment of the heterobimetallic iron(II) alkoxides [(THF)MFe(OtBu)3]2 with p-tert-butylcalix[4]areneH4 (L1H4) affords the oxo-bridged diiron(III) complexes {Fe[M(NCMe)x]2L1}2(μ-O), M=Na, x=2 1⋅8(CH3CN), M= K, x=3 2⋅3.5(CH3CN); similar use of p-tert... Read More about Iron(III) and Zinc(II) calixarene complexes: Synthesis, structural studies, and use as procatalysts for ε-caprolactone polymerization.

Metal catalysts for ε-caprolactone polymerisation (2010)
Journal Article
Arbaoui, A., & Redshaw, C. (2010). Metal catalysts for ε-caprolactone polymerisation. Polymer chemistry, 1(6), 801-826. https://doi.org/10.1039/b9py00334g

Economic pressure, environmental issues and ever increasing demand are driving the shift from oil-based polymers to those available from renewable resources. Ring opening polymerisation of cyclic esters is currently a topical field with metal complex... Read More about Metal catalysts for ε-caprolactone polymerisation.

EPR monitoring of vanadium(IV) species formed upon activation of vanadium(V) polyphenolate precatalysts with AlR2Cl and AlR 2Cl/ethyltrichloroacetate (R = Me, Et) (2009)
Journal Article
Soshnikov, I. E., Semikolenova, N. V., Shubin, A. A., Bryliakov, K. P., Zakharov, V. A., Redshaw, C., & Talsi, E. P. (2009). EPR monitoring of vanadium(IV) species formed upon activation of vanadium(V) polyphenolate precatalysts with AlR2Cl and AlR 2Cl/ethyltrichloroacetate (R = Me, Et). Organometallics, 28(23), 6714-6720. https://doi.org/10.1021/om900515h

Reactions of the vanadyl polyphenolate complexes {VO[p-tert-butylcalix[4] arene(O)3(OMe)]} (1) and [VO(OArCH2ArCH 2OAr)]2 (Ar = 4,6-tert-butylphenol; Ar′ = 4-tert-butylphenol) (2) with AlR3 and AlR2Cl, in the absence and in the presence of reactivato... Read More about EPR monitoring of vanadium(IV) species formed upon activation of vanadium(V) polyphenolate precatalysts with AlR2Cl and AlR 2Cl/ethyltrichloroacetate (R = Me, Et).

Synthesis, structures and luminescent behaviour of tridentate salicylaldiminato-type borate complexes (2009)
Journal Article
Christou, V., Watkins, S. E., McCann, R., Redshaw, C., & Elsegood, M. R. (2010). Synthesis, structures and luminescent behaviour of tridentate salicylaldiminato-type borate complexes. Inorganica Chimica Acta, 363(6), 1173-1178. https://doi.org/10.1016/j.ica.2009.11.006

Treatment of the ligands 3,5-tBu2-2-(OH)C6H2CHNR [R = 2-(CO2H)C6H4 (1a) and 2-(CO2H)C10H6 (1b)] with trimethylborate, B(OMe)3, in toluene yields, after work-up, the yellow crystalline complexes {[3,5-tBu2-2-(O)C6H2CHNR]B(OMe)} [R = 2-(CO2)C6H4 (2a) a... Read More about Synthesis, structures and luminescent behaviour of tridentate salicylaldiminato-type borate complexes.

Synthesis, structure and ethylene polymerisation behaviour of vanadium(iv and v) complexes bearing chelating aryloxides (2009)
Journal Article
Homden, D., Redshaw, C., Warford, L., Hughes, D. L., Wright, J. A., Dale, S. H., & Elsegood, M. R. (2009). Synthesis, structure and ethylene polymerisation behaviour of vanadium(iv and v) complexes bearing chelating aryloxides. Dalton Transactions : an international journal of inorganic chemistry, 8900-8910. https://doi.org/10.1039/b901810g

The reaction of [V(Np-tolyl)Cl3] with the sulfur-bridged diphenol ligand 2,2′-thiobis(4,6-di-tert-butylphenol), {2,2′-S[4,6-(t-Bu)2C6H2OH]2} (LSH2) afforded the complexes [V(LS)2] (1) and [VOCl 3(MeCN)2][H3Np-tolyl] (2). Complex 2 could also be prepa... Read More about Synthesis, structure and ethylene polymerisation behaviour of vanadium(iv and v) complexes bearing chelating aryloxides.

Investigating the nature of the active species in bis(imino)pyridine cobalt ethylene polymerization catalysts (2009)
Journal Article
Soshnikov, I. E., Semikolenova, N. V., Bushmelev, A. N., Bryliakov, K. P., Lyakin, O. Y., Redshaw, C., Zakharov, V. A., & Talsi, E. P. (2009). Investigating the nature of the active species in bis(imino)pyridine cobalt ethylene polymerization catalysts. Organometallics, 28(20), 6003-6013. https://doi.org/10.1021/om900490b

The activation of bis(imino)pyridine cobalt-based catalysts of ethylene polymerization with methylalumoxane (MAO), AlMe3, and AlMe 3/[CPh3][B(C6F5)4] has been studied by 1H, 2H, and 19F NMR and EPR spectroscopy. The nature of the active sites of poly... Read More about Investigating the nature of the active species in bis(imino)pyridine cobalt ethylene polymerization catalysts.

Two related lithium calixarene complexes, [p-tert-butyl-calix[4]arene(OMe) (OH)2(OLi)]2·4MeCN and {p-tert-butyl-calix[4] arene(OH)2(OLi)[OLi(NCMe)2]}2·8MeCN, determined using synchrotron radiation (2009)
Journal Article
Lee, D. S., Elsegood, M. R., Redshaw, C., & Zhan, S. (2009). Two related lithium calixarene complexes, [p-tert-butyl-calix[4]arene(OMe) (OH)2(OLi)]2·4MeCN and {p-tert-butyl-calix[4] arene(OH)2(OLi)[OLi(NCMe)2]}2·8MeCN, determined using synchrotron radiation. Acta Crystallographica Section C: Crystal Structure Communications, 65(8), m291-m295. https://doi.org/10.1107/S0108270109025311

The crystal structures of acetonitrile solvates of two related lithium calixarene complexes have been determined by low-temperature single-crystal X-ray diffraction using synchrotron radiation. Bis(μ-5,11,17,23-tetra-tert- butyl-26,28-dihydr-oxy-25-m... Read More about Two related lithium calixarene complexes, [p-tert-butyl-calix[4]arene(OMe) (OH)2(OLi)]2·4MeCN and {p-tert-butyl-calix[4] arene(OH)2(OLi)[OLi(NCMe)2]}2·8MeCN, determined using synchrotron radiation.

Vanadium-based imido-alkoxide pro-catalysts bearing bisphenolate ligands for ethylene and ε-caprolactone polymerisation (2009)
Journal Article
Arbaoui, A., Redshaw, C., Homden, D. M., Wright, J. A., & Elsegood, M. R. (2009). Vanadium-based imido-alkoxide pro-catalysts bearing bisphenolate ligands for ethylene and ε-caprolactone polymerisation. Dalton Transactions : an international journal of inorganic chemistry, 8911-8922. https://doi.org/10.1039/b902402f

The pro-catalysts [V(NAr)(L)(OR)] (Ar = p-tolyl, p-ClC6H 4, p-(OMe)C6H4, p-(CF3)C 6H4; R = t-Bu, i-Pr, n-Pr, Et, C(CH3)(CF 3)2) have been prepared in good yields from the reaction of [V(NAr)(OR)3] and the bisphenol 2,2′-CH3CH[4,6- (t-Bu)2C6H2OH]2 (LH... Read More about Vanadium-based imido-alkoxide pro-catalysts bearing bisphenolate ligands for ethylene and ε-caprolactone polymerisation.

2-Benzoxazolyl-6-(1-(arylimino)ethyl)pyridyl cobalt (II) chlorides: A temperature switch catalyst in oligomerization and polymerization of ethylene (2009)
Journal Article
Gao, R., Wang, K., Li, Y., Wang, F., Sun, W. H., Redshaw, C., & Bochmann, M. (2009). 2-Benzoxazolyl-6-(1-(arylimino)ethyl)pyridyl cobalt (II) chlorides: A temperature switch catalyst in oligomerization and polymerization of ethylene. Journal of Molecular Catalysis A: Chemical, 309(1-2), 166-171. https://doi.org/10.1016/j.molcata.2009.05.021

A series of cobalt (II) complexes ligated by 2-(2-benzoxazolyl)-6-(1-(arylimino)ethyl)pyridines was synthesized and characterized by FT-IR spectroscopic and elemental analysis. The molecular structures of Co1 (Ar = 2,6-Me2C6H3), Co2 (Ar = 2,6-Et2C6H3... Read More about 2-Benzoxazolyl-6-(1-(arylimino)ethyl)pyridyl cobalt (II) chlorides: A temperature switch catalyst in oligomerization and polymerization of ethylene.

The use of calixarenes in metal-based catalysis (2008)
Journal Article
Homden, D. M., & Redshaw, C. (2008). The use of calixarenes in metal-based catalysis. Chemical reviews, 108(12), 5086-5130. https://doi.org/10.1021/cr8002196

A study was conducted to demonstrate the use of calixarenes in metal-based catalysis. The study focused on rare earth metal-containing species,including neodymium to demonstrate the use of calixarenes in metal-based catalysis. It was found that the a... Read More about The use of calixarenes in metal-based catalysis.

Multinuclear alkylaluminium macrocyclic Schiff base complexes: Influence of procatalyst structure on the ring opening polymerisation of ε-caprolactone (2008)
Journal Article
Arbaoui, A., Redshaw, C., & Hughes, D. L. (2008). Multinuclear alkylaluminium macrocyclic Schiff base complexes: Influence of procatalyst structure on the ring opening polymerisation of ε-caprolactone. Chemical communications : Chem comm / the Royal Society of Chemistry, 4717-4719. https://doi.org/10.1039/b810417d

Two remote dialkylaluminium centres supported by a macrocyclic Schiff base ligand exhibited beneficial cooperative effects, whilst aluminoxane-type bonding proved to be detrimental to activity for the ring opening polymerisation of ε-caprolactone.

Early transition metal complexes bearing a C-capped tris(phenolate) ligand incorporating a pendant imine arm: Synthesis, structure, and ethylene polymerization behavior (2008)
Journal Article
Wright, J. A., Hughes, D. L., Elsegood, M. R., Redshaw, C., & Homden, D. (2008). Early transition metal complexes bearing a C-capped tris(phenolate) ligand incorporating a pendant imine arm: Synthesis, structure, and ethylene polymerization behavior. Inorganic chemistry, 47(13), 5799-5814. https://doi.org/10.1021/ic702506w

The ligand 3-[2,2′-methylenebis(4,6-di-tert-butylphenol)-5-tert- butylsalicylidene-(2,6-diisopropyl)phenylimine] (L 1 H 3 ) was reacted with MCl 4 (M = Ti, Zr) or MCl 5 (M = Nb, Ta) to give complexes of the type [MCl 2 (L 1 H 2 ) 2 ] (M = Ti (1);... Read More about Early transition metal complexes bearing a C-capped tris(phenolate) ligand incorporating a pendant imine arm: Synthesis, structure, and ethylene polymerization behavior.