Diethers of general formula: [Figure] where R, RI, RII, RIII, RIV and RV are the same or different and are H, C1-18 linear or branched alkyl, C5-18 cycloalkyl, C6＿aryl, C7-18 alkylaryl or C7-18 arylalkyl radicals, provided that when R is alkyl, RI is other than H or alkyl and when RI is alkyl, R is
Diethers of general formula: [Figure] where R, RI, RII, RIII, RIV and RV are the same or different and are H, C1-18 linear or branched alkyl, C5-18 cycloalkyl, C6＿aryl, C7-18 alkylaryl or C7-18 arylalkyl radicals, provided that when R is alkyl, RI is other than H or alkyl and when RI is alkyl, R is other than H or alkyl; RVI and RVIII are the same or different and are C1-18 linear or branched alkyl, C5-18 cycloalkyl, C6-18 aryl, or C7-18 arylalkyl radicals; and two or more of R to RV may be bonded to form a cyclic structure having 5 to 18 carbon atoms. The diethers are particularly useful in the preparation of Ziegler-Natta catalysts.
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A diether compound of formula: [Figure] where R, RI, RII, RIII, RIV and RV are the same or different and are H, C1-18 linear or branched alkyl, C5-18 cycloalkyl, C6-18 aryl, C7-18 alkylaryl or C7-18 arylalkyl radicals, provided that when R is H or alkyl, RI is other than H or alkyl and when RI is H
A diether compound of formula: [Figure] where R, RI, RII, RIII, RIV and RV are the same or different and are H, C1-18 linear or branched alkyl, C5-18 cycloalkyl, C6-18 aryl, C7-18 alkylaryl or C7-18 arylalkyl radicals, provided that when R is H or alkyl, RI is other than H or alkyl and when RI is H or alkyl, R is other than H or alkyl; RVI and RVII are the same or different and are C1-18 linear or branched alkyl, C5-18 cycloalkyl, C6-18 aryl, or C7-18 arylalkyl radicals; and two or more of R to RV may be bonded to form a cyclic structure having 5 to 18 carbon atoms.
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