A Delicate Balance between sp2 and sp3 C−H Bond Activation: A Pt(II) Complex with a Dual Agostic Interaction
摘要:
2-tert-Butyl-6-(4-fluorophenyl)pyridine reacts with K2PtCl4 via the activation of an sp(2) C-H bond to give a cyclometalated complex that contains a bifurcated agostic interaction. Rearrangement of this complex results in the activation of an sp(3) C-H bond, and reaction eventually leads to a doubly cyclometalated complex where both sp(2) and sp(3) C-H bonds have been activated. Deuterium exchange studies show that a delicate balance exists between the two cyclometalations.
Concerted reductive coupling of an alkyl chloride at Pt(iv)
作者:Sarah H. Crosby、Helen R. Thomas、Guy J. Clarkson、Jonathan P. Rourke
DOI:10.1039/c2cc31572f
日期:——
Oxidation of a doubly cyclometallated platinum(II) complex results in two isomeric platinum(IV) complexes. Whereas the trans isomer is robust, being manipulable in air at room temperature, the cis isomer decomposes at -20 degrees C and above. Reductive coupling of an alkyl chloride at the cis isomer gives a new species which can be reoxidised. The independence of this coupling on additional halide