So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Calderon, J. L.; Cotton, F. A.; Shaver, Alan researched the compound: Potassiumtris(1-pyrazolyl)borohydride( cas:18583-60-3 ).Electric Literature of C9H10BKN6.They published the article 《Complexes of polypyrazolylborate ligands. II. Conformational isomerism in [hydridotris(1-pyrazolyl)borate] (h5-cyclopentadienyl)dicarbonylmolybdenum and [diethylbis(1-pyrazolyl)borate] (h5-cyclopentadienyl)dicarbonylmolybdenum》 about this compound( cas:18583-60-3 ) in Journal of Organometallic Chemistry. Keywords: pyrazolylborate cyclopentadienyl molybdenum carbonyl; borate cyclopentadienyl molybdenum carbonyl; PMR cyclopentadienylmolybdenum conformation; IR cyclopentadienylmolybdenum conformation. We’ll tell you more about this compound (cas:18583-60-3).
In this abstract C5H5 = h5-cyclopentadienyl. Structural studies of [HB(pz)3](C5H5)(CO)2Mo and [Et2B(pz)2](C5H5)(CO)2Mo, where HB(pz)3 and Et2B(pz)2 represent the hydridotris(pyrazolyl)borate and the diethylbis(pyrazolyl)borate groups, resp., are carried out in solution using ir and PMR spectra. The data indicate that the pyrazolyl groups coordinate as bidentate ligands to form 6-membered rings and that the rings exist in 2 conformations which interconvert in solution, which explains the temperature dependence of the PMR spectrum of [B(pz)4](C5H5)(CO)2Mo.
Although many compounds look similar to this compound(18583-60-3)Electric Literature of C9H10BKN6, numerous studies have shown that this compound(SMILES:[BH-](N1N=CC=C1)(N2N=CC=C2)N3N=CC=C3.[K+]), has unique advantages. If you want to know more about similar compounds, you can read my other articles.
Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics