691004-69-0Relevant academic research and scientific papers
Bitopic bis- and tris(1-pyrazolyl)borate ligands: Syntheses and structural characterization
Bieller, Susanne,Zhang, Fan,Bolte, Michael,Bats, Jan W.,Lerner, Hans-Wolfram,Wagner, Matthias
, p. 2107 - 2113 (2008/10/09)
Starting from 1,4- and 1,3-diborylated benzene derivatives, bitopic bis(1-pyrazolyl)borates (K2[1,4-tBuBpz2)2C 6H4]; (Li,K)2[1,3-(tBuBpz2) 2C6H4]) and tris(1-pyrazolyl)borates (K 2[1,4-(Bpz3)2C6H4]) have been synthesized (pz = pyrazolyl). X-ray single-crystal structure analyses revealed K2[1,3-(tBuBpZ2)2C6H 4] to establish a polymeric structure in the solid state. In contrast, the unsymmetrically substituted hydrolysis product Li 2[1,3-(tBuBpz2)(tBuB(OH)pz)C6H4] forms discrete dimers in which four lithium cations are encapsulated by their organic ligands. As a representative of bitopic 1,2-diboryl benzene-based scorpionates, the 9,10-dihydro-9,10-diboraanthracene derivative K 2[(Bpz2)2(C6H4) 2] is described, which bears two pyrazolyl substituents at each of its boron atoms and stands out due to its stereorigidity.
