Skeletal Isomerization of the [Pt3(μ-PPh2)3Ph(PPh3)2] Cluster by Recrystallization in Various Solvents
Dr. Robert Bender
Laboratorie de Chimie de Coordination, UA 416 CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, F-67 070 Strasbourg Cédex (France)
Search for more papers by this authorCorresponding Author
Dr. Pierre Braunstein
Laboratorie de Chimie de Coordination, UA 416 CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, F-67 070 Strasbourg Cédex (France)
Laboratorie de Chimie de Coordination, UA 416 CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, F-67 070 Strasbourg Cédex (France)Search for more papers by this authorProf. Antonio Tiripicchio
Instituto di Chimica Generale ed Inorganica, Università di Parma Centro di Studio per la Strutturistica Diffrattometrica del CNR, I-43 100 Parma (Italy)
Search for more papers by this authorProf. Marisa Tiripicchio Camellini
Instituto di Chimica Generale ed Inorganica, Università di Parma Centro di Studio per la Strutturistica Diffrattometrica del CNR, I-43 100 Parma (Italy)
Search for more papers by this authorDr. Robert Bender
Laboratorie de Chimie de Coordination, UA 416 CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, F-67 070 Strasbourg Cédex (France)
Search for more papers by this authorCorresponding Author
Dr. Pierre Braunstein
Laboratorie de Chimie de Coordination, UA 416 CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, F-67 070 Strasbourg Cédex (France)
Laboratorie de Chimie de Coordination, UA 416 CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, F-67 070 Strasbourg Cédex (France)Search for more papers by this authorProf. Antonio Tiripicchio
Instituto di Chimica Generale ed Inorganica, Università di Parma Centro di Studio per la Strutturistica Diffrattometrica del CNR, I-43 100 Parma (Italy)
Search for more papers by this authorProf. Marisa Tiripicchio Camellini
Instituto di Chimica Generale ed Inorganica, Università di Parma Centro di Studio per la Strutturistica Diffrattometrica del CNR, I-43 100 Parma (Italy)
Search for more papers by this authorAbstract
The solvent used for crystallization determines which of the two structural isomers of [Pt3(μ-PPh2)3Ph(PPh3)2] 1 is formed. The isomer 1a is obtained in crystalline form from toulene/pentane, the isomer 1b · 2CH2Cl2 from CH2Cl2/pentane. The two isomers differ in their PtPt distances and PtPPh2Pt angles.
References
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- 3 A solution of [Pt(C2H4)(PPh3)2] (0.75 g, 1.00 mmol) in 50 mL of acetone was heated under reflux for 8 h. After cooling, the red microcrystalline powder of 1a was filtered off (0.10 g, 17% based on Pt). Recrystallization from hot acetone afforded bright red needles suitable for X-ray diffraction. Recrystallization from CH2Cl2/pentane at −20°C gave dark red crystals of 1b. CH2Cl2. Correct elemental analyses were obtained. IR (KBr) 1a/1b: 528 (s), 517 (m), 503 (m), 485 (vs), 455 (w) cm−1.
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