Structure and electronics in 1H-pyrrol-2-ylmethylene compounds
作者:Briana R. Schrage、Victor N. Nemykin、Christopher J. Ziegler
DOI:10.1016/j.tet.2020.131149
日期:2020.5
between pyrrole aldehydes and several organic CH acids. New compounds were characterized by a variety of spectroscopic methods, electrochemistry as well as X-ray crystallography. DFT calculations on these compounds indicates an appreciable amount of electronic delocalization between the pyrrole and acid-derived alkene units. The compounds display a single intense π→π* transitions in the UV–visible
Synthesis, conformational, spectroscopic and chemical reactivity analysis of 2-cyano-3-(1H-pyrrol-2-yl)acrylohydrazide using experimental and quantum chemical approaches
作者:Poonam Rawat、R.N. Singh
DOI:10.1016/j.molstruc.2014.10.072
日期:2015.2
synthesized pyrrole derivative 2-cyano-3-(1 H -pyrrol-2-yl)acrylohydrazide (2CPA) C 8 H 8 N 4 O using experimental and quantum chemical techniques. The presence of signal at δ 8.010 ppm due to vinyl proton as well as NH and NH 2 protons signals at 11.054 and 2.499 ppm in experimental 1 H NMR spectrum indicate that 2CPA contain CH CCN and NH NH 2 frame. The combinedexperimental and theoretical symmetric
摘要 本文描述了新合成的吡咯衍生物 2-氰基的合成、光谱( 1 H 和 13 C NMR、UV-Visible、FT-IR 和 ESI Mass)、构象分析、化学反应性和非线性光学 (NLO) 性质。 -3-(1 H -pyrrol-2-yl)丙烯酰肼 (2CPA) C 8 H 8 N 4 O 使用实验和量子化学技术。由于乙烯基质子以及 11.054 和 2.499 ppm 处的 NH 和 NH 2 质子信号,δ 8.010 ppm 处的信号存在于实验 1 H NMR 光谱中,表明 2CPA 包含 CH CCN 和 NH NH 2 框架。组合的实验和理论对称(3194 cm -1 )和不对称(3221 cm -1 )伸缩波数分析证实合成化合物的固相FT-IR光谱中存在游离NH 2 基团。使用密度泛函理论 (DFT) 和分子中原子的量子理论 (QTAIM) 计算发现二聚体形成的相互作用能分别为
Molecular structure, hydrogen-bonding, chemical reactivity and first hyperpolarizability analysis of a new synthesized 1,9-bis(2-cyano-2-ethoxycarbonylvinyl)-5-(2-nitrophenyl)-dipyrromethane: Experimental and theoretical (DFT and QTAIM) approach
作者:R.K. Tiwari、Amit Kumar、Poonam Rawat、R.N. Singh
DOI:10.1016/j.molstruc.2013.08.050
日期:2013.11
ipyrromethane (3) molecularstructure, hydrogen-bonding, chemical reactivity and first hyperpolarizability have been investigated. The molecularstructure evaluation and spectral analysis of (3) have been done using B3LYP functional and 6-31G(d,p) as basis set. Thermodynamic parameters (H, G, S) of all the reactants and products have been used to determine nature of the chemical reaction. The observed
Non-symmetric tripyrranes in the synthesis of novel macrocycles
申请人:——
公开号:US20030232800A1
公开(公告)日:2003-12-18
The present invention provides certain non-symmetric tripyrranes; that is, tripyrranes that do not contain a mirror plane of symmetry perpendicular to the plane containing the tripyrrane. Further, the invention includes texaphyrin compounds and sapphyrin compounds, as well as other polypyrrolic macrocycles, prepared using tripyrranes of Formula I as a precursor. These macrocycles are characterized by a tripyrrolic portion of the macrocyclic ring having substituents that cause the heterocycle to lack a plane of symmetry perpendicular to the plane of the macrocycle.