Recently I am researching about SERIE DES AZOLES; CROSS-POLARIZATION; CHEMICAL-SHIFTS; NMR; C-13; POLYAZOLYLMETHANES; CHEMISTRY; PYRAZOLES; RMN, Saw an article supported by the Ministerio de Ciencia, Innovacion y Universidades [PGC2018-094644-B-C22]; Direccion General de InvestigaciOn en InnovaciOn de la Comunidad de Madrid [PS2018/EMT-4329 AIRTEC-CM]; University of AveiroEuropean Commission [FCTUID/QUI/00062/2019]; FCT/MEC [FCTUID/QUI/00062/2019]; FEDER, within the PT2020 Partnership; UNED. Published in PERGAMON-ELSEVIER SCIENCE LTD in OXFORD ,Authors: Silva, VLM; Silva, AMS; Claramunt, RM; Lopez, C; Sanz, D; Infantes, L; Lopez, AM; Reviriego, F; Alkorta, I; Elguero, J. The CAS is 67-51-6. Through research, I have a further understanding and discovery of 3,5-Dimethyl-1H-pyrazole. Recommanded Product: 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.
Recommanded Product: 67-51-6. Welcome to talk about 67-51-6, 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 send Email.
Reference:
Pyrazole – Wikipedia,
,Pyrazoles – an overview | ScienceDirect Topics