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The cationic complexes [(1-Me-Ind)Ni(PPh 3 )(L)] + (1-Me-Ind = 1-methylindenyl; L = PPh 3, PMe 3, or MeCN) have been prepared and characterized spectroscopically and by means of single-crystal X-ray structural analysis in the case of [(1-Me-Ind)Ni(PPh 3 )(PMe 3 )]AlCl 4 . The in-situ-generated cations dimerize ethylene.
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Vollmerhaus et al. (1997) studied this question.
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