Lithium calix[4]arenes: structural studies and use in the ring opening polymerization of cyclic esters by Orlando Santoro, Mark Elsegood, Simon J Teat, Takehiko Yamato, Carl Redshaw

“…Interestingly, the mixed sulfinyl/sulfonyl complexes [Li8(calix[4]arene(SO)(SO2)(SO1.68)2)2(THF)6]·8(THF) (3·8THF) and [Li5Na(LSO/3SO2H)2(THF)5]·7.5(THF) (4·7.5(THF) have also been characterized. …”
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Vanadyl calix[6]arene complexes: synthesis, structural studies and ethylene homo-(co-)polymerization capability by Carl Redshaw, Mark J. Walton, Kenji Michiue, Yimin Chao, Alex Walton, Pertti Elo, Victor Sumerin, Chengying Jiang, Mark Elsegood

“…When the reverse order of addition was employed such that lithium tert-butoxide (7.5 equivalents) was added to L6H6, and subsequently treated with VOCl3 (2 equiv.), the complex {[VO(THF)][VO(μ-O)]2Li(THF)(Et2O)][L6]}·2Et2O·0.5THF (4·2Et2O·0.5THF), which contains a trinuclear motif possessing a central octahedral vanadyl centre linked via oxo bridges to two tetrahedral (C3v) vanadyl centres, was isolated. …”
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Lithiated calix[ n]arenes (n = 6 or 8): Synthesis, structures, and use in the ring-opening polymerization of cyclic esters by Tian Xing, Chengying Jiang, Mark Elsegood, Carl Redshaw

“…Use of debutylated calix[8]areneH8 (deBuL8H8) led to an elongated dimer [Li18(deBuL8)2(OtBu)2(THF)14]·4THF (3·4THF) in which the calix[8]arenes possess a wavelike conformation forming bridges to link three separate LixOy clusters (where x and y = 6, ignoring the THF donor oxygens). …”
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Vanadium(V) oxo and Imido calix[8]arene complexes: synthesis, structural studies, and ethylene homo/copolymerisation capability by Carl Redshaw, Mark J. Walton, Darren S. Lee, Chengying Jiang, Mark Elsegood, Kenji Michiue

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Insights into the structures adopted by titanocalix[6 and 8]arenes and their use in the ring opening polymerization of cyclic esters by Orlando Santoro, Mark Elsegood, Elizabeth Bedwell, Jake Pryce, Carl Redshaw

“…Extension of the L2H8 chemistry to [TiBr4] afforded, depending on the stoichiometry, the complexes [(TiBr)2(TiBrNCMe)2(μ3-O)2(L2 )]·6MeCN (6·6MeCN) or [Ti(NCMe)2Br]2[Ti(O)Br2(NCMe)](L2 )]·7.5MeCN (7·7.5MeCN), whilst use of [TiF4] afforded complexes containing Ca2+ and Na+ , thought to originate from drying agents, namely [Ti8CaF20(OH2)Na2(MeCN)4(L2 )2]·14MeCN (8·14MeCN), [Na(MeCN)2][Ti8CaF20NaO16(L2 )2]·7MeCN (9·7MeCN) or [Na]6[Ti8F20Na(MeCN)2(L2 )][Ti8F20Na(MeCN)0.5(L2 )]·15.5(C2H3N) (10·15.5MeCN). …”
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Supplementary Information files for Insights into the structures adopted by titanocalix[6 and 8]arenes and their use in the ring opening polymerization of cyclic esters by Orlando Santoro, Mark Elsegood, Elizabeth Bedwell, Jake Pryce, Carl Redshaw

“…Extension of the L2H8 chemistry to [TiBr4] afforded, depending on the stoichiometry, the complexes [(TiBr)2(TiBrNCMe)2(μ3-O)2(L2)]∙6MeCN (6∙6MeCN) or [Ti(NCMe)2Br]2[Ti(O)Br2(NCMe)](L2)]∙7.5MeCN (7∙7.5MeCN), whilst use of [TiF4] afforded complexes containing Ca2+ and Na+, thought to originate from drying agents, namely [Ti8CaF20(OH2)Na2(MeCN)4(L2)2]∙14MeCN (8∙14MeCN), [Na(MeCN)2][Ti8CaF20NaO16(L2)2]∙7MeCN (9∙7MeCN) or [Na]6[Ti8F20Na(MeCN)2(L2)][Ti8F20Na(MeCN)0.5(L2)]∙15.5(C2H3N) (10∙15.5MeCN). …”
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