JOURNAL ARTICLE

Synthesis of Mixed-Valence Platinum Triangulo Clusters\n[Pt<sub>3</sub>(μ-PPh<sub>2</sub>)<sub>2</sub>(μ-C<sub>6</sub>F<sub>5</sub>)(C<sub>6</sub>F<sub>5</sub>)(PPh<sub>2</sub>R)<sub>2</sub>] (R = Ph, Me, Et).\nCrystal Structures of [Pt<sub>3</sub>(μ-PPh<sub>2</sub>)<sub>2</sub>(μ-C<sub>6</sub>F<sub>5</sub>)(C<sub>6</sub>F<sub>5</sub>)(PPh<sub>3</sub>)<sub>2</sub>]\nand [Pt<sub>3</sub>(μ-AgOClO<sub>3</sub>)(μ-PPh<sub>2</sub>)<sub>2</sub>(μ-C<sub>6</sub>F<sub>5</sub>)(C<sub>6</sub>F<sub>5</sub>)(PPh<sub>3</sub>)<sub>2</sub>]<sup>†</sup>

Abstract

The reaction between [(C<sub>6</sub>F<sub>5</sub>)<sub>2</sub>Pt(μ-PPh<sub>2</sub>)<sub>2</sub>Pt(PPh<sub>2</sub>R)<sub>2</sub>] and [Pt(C<sub>7</sub>H<sub>10</sub>)<sub>3</sub>] in toluene yields\nthe triangulo complexes [Pt<sub>3</sub>(μ-PPh<sub>2</sub>)<sub>2</sub>(μ-C<sub>6</sub>F<sub>5</sub>)(C<sub>6</sub>F<sub>5</sub>)(PPh<sub>2</sub>R)<sub>2</sub>] (R = Ph <b>4</b>, Me <b>5</b>, Et <b>6</b>), which\ncontain two phosphido and one pentafluophenyl bridging ligands and two phosphines and\none pentafluophenyl terminal ones. The triangulo metal core displays three Pt−Pt bonds,\nas expected for a 42 valence electron count cluster. The basicity of these metal cores is\ndemonstrated through the reaction of one of the complexes (R = Ph) with AgClO<sub>4</sub> or [Ag(OClO<sub>3</sub>)(PPh<sub>3</sub>)], which gives the corresponding adduct [Pt<sub>3</sub>(AgOClO<sub>3</sub>)(μ-PPh<sub>2</sub>)<sub>2</sub>(μ-C<sub>6</sub>F<sub>5</sub>)(C<sub>6</sub>F<sub>5</sub>)(PPh<sub>3</sub>)<sub>2</sub>] (<b>7</b>) or [Pt<sub>3</sub>Ag(μ-PPh<sub>2</sub>)<sub>2</sub>(μ-C<sub>6</sub>F<sub>5</sub>)(C<sub>6</sub>F<sub>5</sub>)(PPh<sub>3</sub>)<sub>3</sub>][ClO<sub>4</sub>] (<b>8</b>). The X-ray structures of <b>4</b> and\n<b>7</b> have been determined.

Keywords:
Platinum Adduct Metal Toluene Valence (chemistry) Inorganic compound

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