Cyclodimers versus cyclotrimers via solvent or temperature effects on metallacyclization.
The reaction of (COD)PdCl 2 (COD = 1,5-cyclooctadiene) with bis(3-pyridyl)methylphenylsilane (L) in acetone affords single crystals consisting of cyclodimers, [PdCl 2(L)] 2, whereas the reaction in a mixture of dichloromethane and ethanol yields amorphous spheres consisting of cyclotrimers, [PdCl 2(L)] 3. The interconversion and morphology control between the crystals and the microspheres can be explained by the difference in flexibility between the cyclodimer and cyclotrimer.
Department of Chemistry, Pusan National University, Pusan 609-735, Korea.
Hyun Ji
HJ
Kang
Tae Hwan
TH
Noh
Jong Sung
JS
Jin
Ok-Sang
OS
Jung