Formula: C5H8N2. In 2019.0 TETRAHEDRON published article about SERIE DES AZOLES; CROSS-POLARIZATION; CHEMICAL-SHIFTS; NMR; C-13; POLYAZOLYLMETHANES; CHEMISTRY; PYRAZOLES; RMN in [Silva, Vera L. M.; Silva, Artur M. S.] Univ Aveiro, Chem Dept, P-3810193 Aveiro, Portugal; [Silva, Vera L. M.; Silva, Artur M. S.] Univ Aveiro, QOPNA, P-3810193 Aveiro, Portugal; [Claramunt, Rosa M.; Lopez, Concepcion; Sanz, Dionisia] UNED, Fac Ciencias, Dept Quim Organ & Bioorgan, Paseo Senda Rey 9, E-28040 Madrid, Spain; [Infantes, Lourdes; Martinez Lopez, Angela] CSIC, Dept Cristalog & Biol Estruct, Inst Quim Fis Rocasolano, Serrano 119, E-28006 Madrid, Spain; [Reviriego, Felipe; Alkorta, Ibon; Elguero, Jose] CSIC, Inst Quim Med, Juan Cierva 3, E-28006 Madrid, Spain; [Reviriego, Felipe] Inst Ciencia Tecnol Polimeros, Juan Cierva 3, E-28006 Madrid, Spain in 2019.0, Cited 33.0. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6.
Tetrakis(1H-pyrazol-l-yl)methanes are very rare compounds of which only two are known: the unsubstituted 1 obtained classically by Wicket in 1937 from carbon tetrachloride and prepared again several times and the 3,5-dimethyl substituted 2 obtained serendipitously by Pombeiro in 2009. We have now extended this group to include four new derivatives 8, 9,11 and 12 bearing methyl groups. The X-ray crystal structure of the four compounds has been determined. They have been studied by NMR both in solution (H-1, C-13, N-15) and in the solid state (C-13 and N-15). DFT calculations of the six compounds (geometries, energies and absolute shieldings) have been used to discuss the experimental observations. (C) 2019 Elsevier Ltd. All rights reserved.
Formula: C5H8N2. About 3,5-Dimethyl-1H-pyrazole, If you have any questions, you can contact Silva, VLM; Silva, AMS; Claramunt, RM; Lopez, C; Sanz, D; Infantes, L; Lopez, AM; Reviriego, F; Alkorta, I; Elguero, J or concate me.
Reference:
Pyrazole – Wikipedia,
,Pyrazoles – an overview | ScienceDirect Topics