Add time:08/21/2019         Source:sciencedirect.com

Publisher SummaryThis chapter presents a review on trifluorophosphine complexes of transition metals, based on the materials prior to early 1984. This chapter discusses the synthetic, structural, and spectroscopic aspects of an extensive range of transition metal phosphine (PF3) complexes including a wide variety of organometallic derivatives. PF3 can stabilize novel systems which have no precedent with other phosphine ligands. The presence of 31P and 19F nuclei offers nuclear magnetic resonance (NMR) spectroscopic advantages in structural assignments and in the study of inter- and intramolecular ligand-exchange processes. The first zero-valent binary transition metal-trifluorophosphine complex to be reported was [Ni(PF3)4]. The trifluorophosphine metal hydrido compounds are usually highly acidic and can readily form metallate ions. Transition metal carbonyl complexes can be suitable precursors—for example, treatment of hydrido complexes or their alkali salts with PF3 under UV irradiation followed if necessary by acidification of the reaction mixture. Various physical evidence suggests that PF and CO are very similar in their behavior toward transition metals. Anionic halogeno complexes are usually obtained by addition of either tetraalkylammonium or tetraphenylarsonium halides to a dinuclear halogeno-bridged metal—PF3 complex or, alternatively, by simple addition of PF3 to dinuclear halogenobridged anions.

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