Tris triisopropylphosphine platinum

The properties of tris(triethylphosphine)platinum(0) are described with those of tris(triisopropylphosphine)platinum(0). 

Shriver, Manipulation of Air-Sensitive Compounds, McGraw-Hill, New York, 1969. 

Tetrakis(triethylphosphine)platinum(0) is extremely air sensitive and readily soluble in saturated aliphatic hydrocarbons. The complex can be stored under dry nitrogen in a freezer (—35°) for several months. The complex readily loses one of the coordinated phosphine molecules to give Pt(PEt3)3 (dissociation constant (Kj) in heptane is 3.0 x 10 ). The HNMR spectrum measured in benzene-d5 shows two multiplets at 3 1.56 (CHj) and 1.07 ppm (CH3). Tetrakis(triethylphosphine)platinum(0) is a strong nucleophile and reacts readily with chlorobenzene and benzonitrile to give (r-phenyl complexes PtX(PhXPEt3)2 (X = C1, CM). Oxidative addition of EtOH affords [PtH(PEt3)3]  

Tris- and tetrakis(triphenylphosphine) derivatives of zero-valent platinum can be obtained by reduction of platinum(II) triphenylphosphine compounds by alcoholic potassium hydroxide or hydrazine. The tris(triphenyl-phosphine) derivative is easily obtained from the tetrakis derivative by treatment with hot ethanol.  

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