Reactions of sodium tetrahydridoborate with tris(pyrazolyl)methane ligands. Syntheses and solid state structures of {[HC(pz)3](thf)Na(μ11,μ11-BH4)}2 and {[HC(3,5-Me2pz)3]2Na}(BH4) (pz=pyrazolyl ring, thf=tetrahydrofuran)
摘要:
The reaction of NaBH4 and HC(pz)(3) in thf yields {[HC(pz)(3)](thf)Na(mu (1)(1), mu (1)(1)-BH4)}(2). The solid state structure shows that the two BH4 ligands bridge the sodium atoms in an unusual manner such that only one hydrogen in each bonds to each sodium forming two mu (1)(1),mu (1)(1)-type bonds. The reaction of HC(3,5-Me(2)pz)(3) and NaBH4 in either a 1:1 or 2:1 ratio yields {[HC(3,5-Me(2)pz)(3)](2)Na}(BH4). The solid state structure shows that both HC(3,5-Me(2)pz)(3) ligands are coordinated to sodium in a trigonally distorted octahedral arrangement and the BH4 group is the counter-ion. (C) 2001 Elsevier Science Ltd. All rights reserved.