Butanediyl bis triphenylphosphine palladium II

All reactions and operations should be carried out under argon and all solvents 

To a pentane (10 mL) solution of PdCH2(CH2)2CH2(tmeda) (0.1 g, 0.36 mmole) triphenylphosphine (0.19 g, 0.72 trunole) in pentane (10 mL) is added with rapid stirring, over a period of 3 min, at room temperature. Almost immediately, a pale-yellow crystalline solid forms. The mixture is stirred for 2 hr, then filtered, and the crystals are washed several times with pentane and dried under vacuum. The yield is 0.204 g (90%). 

---

Butanediyl)bis(triphenylphosphine)palladium(II) is a cream-colored crystalline compound, moderately air-stable as a solid and quite unstable in solution. It is insoluble in pentane but soluble in benzene. Its H-nmr spectrum (60 MHz, benzene-c 6, 6 in ppm downfield from IMS) shows a complex multiplet centered at 2.33 (methylene protons of the palladacyclopentane moiety) and multiplets at 6.80-7.80 (aromatic protons). 

---