PUMA publications for /tag/tetrazine;pyrazinehttps://puma.ub.uni-stuttgart.de/tag/tetrazine;pyrazinePUMA RSS feed for /tag/tetrazine;pyrazine2024-03-28T17:00:52+01:00Electronic structure of 1,4-dihydro-1,2,4,5-tetrazines and of related 1,4-dihydroaromatic compoundshttps://puma.ub.uni-stuttgart.de/bibtex/2514e60ec0a04ccd1afa2ef12177be505/huebleriachuebleriac2022-06-15T11:26:56+02:00MO MO;MO MO;hexazine azine;photoelectron configuration cyclic electron spectra tetrazine;cyclohexadiene tetrazine;pyrazine voltammetry <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/171d51f24118806fa8c80752281507ef4/author/0"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry</span>, </em> </span>(<em><span>1985<meta content="1985" itemprop="datePublished"/></span></em>)</span>Wed Jun 15 11:26:56 CEST 2022Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry101633--1637Electronic structure of 1,4-dihydro-1,2,4,5-tetrazines and of related 1,4-dihydroaromatic compounds1985MO MO;MO MO;hexazine azine;photoelectron configuration cyclic electron spectra tetrazine;cyclohexadiene tetrazine;pyrazine voltammetry 1,4-Dihydro-1,2,4,5-tetrazine (I) and its 1,4-di-Me and 1,4-bis(trimethylsilyl) derivs. were studied by photoelectron spectroscopy and cyclic voltammetry. The compds. are electron-rich, albeit not as much as the corresponding 1,4-dihydropyrazines. Electrochem. data illustrate the stability of the 1,4-dihydro form in the tetrazine system and of the radical cation oxidn. state in the pyrazine system. Results of MNDO calcns. for I and for 1,4-dihydrobenzene, -pyrazine, and -hexazine indicate a contraction of bonds in the 6-membered ring upon consecutive replacement of CH by N, accompanied by increasing deviation from planarity and decreasing \textgreek{p} electron conjugation. [on SciFinder(R)]Electronic structure of 1,4-dihydro-1,2,4,5-tetrazines and of related 1,4-dihydroaromatic compoundshttps://puma.ub.uni-stuttgart.de/bibtex/2514e60ec0a04ccd1afa2ef12177be505/b_schwederskib_schwederski2019-07-15T13:41:23+02:00MO MO;MO MO;hexazine azine;photoelectron configuration cyclic electron spectra tetrazine;cyclohexadiene tetrazine;pyrazine voltammetry <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/171d51f24118806fa8c80752281507ef4/author/0"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry</span>, </em> </span>(<em><span>1985<meta content="1985" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry101633--1637Electronic structure of 1,4-dihydro-1,2,4,5-tetrazines and of related 1,4-dihydroaromatic compounds1985MO MO;MO MO;hexazine azine;photoelectron configuration cyclic electron spectra tetrazine;cyclohexadiene tetrazine;pyrazine voltammetry 1,4-Dihydro-1,2,4,5-tetrazine (I) and its 1,4-di-Me and 1,4-bis(trimethylsilyl) derivs. were studied by photoelectron spectroscopy and cyclic voltammetry. The compds. are electron-rich, albeit not as much as the corresponding 1,4-dihydropyrazines. Electrochem. data illustrate the stability of the 1,4-dihydro form in the tetrazine system and of the radical cation oxidn. state in the pyrazine system. Results of MNDO calcns. for I and for 1,4-dihydrobenzene, -pyrazine, and -hexazine indicate a contraction of bonds in the 6-membered ring upon consecutive replacement of CH by N, accompanied by increasing deviation from planarity and decreasing \textgreek{p} electron conjugation. [on SciFinder(R)]