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Base-promoted cyclization reactions of free and Platinum(II)-coordinated o-(phosphoniomethyl)phenyl isocyanide tetrafluoroborates, o-(BF4-R3P+-CH2)C6H4NC. Synthesis and spectroscopic characterization of 1-platinum(II)-substituted and 2-platinum(II)-substituted Indole-derivatives and X-ray Structure of Trans-((PPh3)2Pt[CN(H)-o-C6H4C(PMe3)]Cl)BF4.C2H4Cl2.
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Michelin et al. (1986) studied this question.
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