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 Novel pyrazolylborato- and pyrazolylruthenium complexes. Crystal and molecular structures of [{H(μ-H)B(3,5-Me2pz)2}Ru(η4-C8H12)H] and [(η4-C8H12)2Ru2H{μ-N:C(Me)pz}(μ-pz)(μ-H)]: confirmation of the first examples of the Ru···H-B agostic interaction and the bridging amidine ligand.Related Products of 18583-60-3.
The reactions of [(η4-C8H12)RuH(NH2NMe2)3]PF6 (I; C8H12 = 1,5-cyclooctadiene) and [{η4-C8H12)RuCl(Me)(NCMe)}2] with K[H2B(3,5-Me2pz)2] (pz = 1-pyrazolyl) give [{H(μ-H)B(3,5-Me2pz)2}Ru(η4-C8H12)X] [X = H (II), Me], the first examples of the Ru···H-B interaction and verified in II by x-ray crystallog. Treatment of I with K[R2Bpz2] (R = Et, Ph) in MeCN results in pyrazolylborate fragmentation giving the dinuclear complex [(η4-C8H12)2Ru2H{μ-N:C(Me)pz}(μ-pz)(μ-H)] (III), confirmed by x-ray crystallog. to contain the first example of a bridging amidine ligand. In II the Ru···B and agostic Ru···H-B distances are 2.673(2) and 2.06(2)Å, resp. In III the Ru···Ru and semi-bridging Ru···H-Ru distances are 2.919(1) and 2.03(4) Å, resp. The similarity of the Ru···H-X interactions in the two complexes would indicate that both are best described in terms of an agostic hydrogen interaction with a 16-electron ruthenium center.
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