Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Potassiumtris(1-pyrazolyl)borohydride, is researched, Molecular C9H10BKN6, CAS is 18583-60-3, about Synthesis, structural characterization and ethylene polymerization behavior of complex [Ph4P][CrCl3{HB(pz)3}] [HB(pz)3 = hydrotris(1-pyrazolyl)borate].Product Details of 18583-60-3.
Reaction of CrCl3(THF)3 with K[HB(pz)3] in THF gives the complex K[CrCl3{HB(pz)3}] (1). The salt metathesis of complex 1 with [Ph4P]Br in CH2Cl2 yields [Ph4P][CrCl3{HB(pz)3}] (2). The structure of complex 2·CHCl3 was determined by single crystal x-ray diffraction. In the anion the metal center shows a distorted octahedral geometry with the hydrotris(1-pyrazolyl)borate bonded as N,N’,N”-donor tripod ligand and three chloride atoms completing the coordination sphere. Complex 2 in the presence of MAO gives an active catalyst for the polymerization of ethylene.
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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics