Jan Nickolaus, Johannes Bender, Martin Nieger and Dietrich Gudat Sterically Controlled Synthesis and Nucleophilic Substitution Reactions of Di- and Trimeric N-Heterocyclic Phosphenium Metal(0) Halides European Journal of Inorganic Chemistry 2014
The size of the bridging ligand controls whether N-heterocyclic phosphenium metal(0) chlorides [MCl(NHP)]n (M = Pd, Pt) form dimers or trimers. The oligomers resist attempts to exchange bridging NHP units, but easily undergo displacement of the chlorido terminal ligands. This reaction can be employed in a catalytic synthesis of formaldehyde dibenzylthioacetal.
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