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.
Kang
Hyun Ji
HJ
Department of Chemistry, Pusan National University, Pusan 609-735, Korea.
Noh
Tae Hwan
TH
Jin
Jong Sung
JS
Jung
Ok-Sang
OS