PUMA publications for /tag/heterocycle;NMRhttps://puma.ub.uni-stuttgart.de/tag/heterocycle;NMRPUMA RSS feed for /tag/heterocycle;NMR2024-03-28T21:56:40+01:00Chemistry of boron. C. Radical ions. XXXI. NMR and ESR spectroscopic investigations on five- and six-membered boron-nitrogen heterocycleshttps://puma.ub.uni-stuttgart.de/bibtex/25d595ba67ad1538b4e5f393886bb9fac/b_schwederskib_schwederski2019-07-15T13:41:23+02:00ESR boron heterocycle;NMR heterocycle;radical heterocycle;tetraazadiboracyclohexane ion ion;triazodiboracyclopentane nitrogen radical <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Heinrich Noeth" itemprop="url" href="/person/18f51f1679a0552c7891fb06bec291f73/author/0"><span itemprop="name">H. Noeth</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Winterstein" itemprop="url" href="/person/18f51f1679a0552c7891fb06bec291f73/author/1"><span itemprop="name">W. Winterstein</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Kaim" itemprop="url" href="/person/18f51f1679a0552c7891fb06bec291f73/author/2"><span itemprop="name">W. Kaim</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Hans. Bock" itemprop="url" href="/person/18f51f1679a0552c7891fb06bec291f73/author/3"><span itemprop="name">H. Bock</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Chemische Berichte</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">112 </span></span>(<span itemprop="issueNumber">7</span>):
<span itemprop="pagination">2494--2502</span></em> </span>(<em><span>1979<meta content="1979" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Chemische Berichte72494--2502Chemistry of boron. C. Radical ions. XXXI. NMR and ESR spectroscopic investigations on five- and six-membered boron-nitrogen heterocycles1121979ESR boron heterocycle;NMR heterocycle;radical heterocycle;tetraazadiboracyclohexane ion ion;triazodiboracyclopentane nitrogen radical Heterocycles I, contg. 6 pairs of \textgreek{p} electrons, are formed preferentially on reaction of bifunctional R1PX2 with monoalkylhydrazines and have planar structures, according to NMR investigations. In contrast, tetraazadiboracyclohexanes II, with 8 \textgreek{p} electrons, exhibit the twist conformation. One-electron oxidn. of I and II with AlCl3 in CH2Cl2 both yield the dark-blue, thermodn. favored radical cation III (R = R1 = Me, R = Me, R1 = NMe2), which, as a presumably planar 7 \textgreek{p}-electron system, is iso-\textgreek{p}-electronic with C6H6 radical anions. The ESR spectrum of III shows as sets of equiv. nuclei 4 N, 12 H and 2 B. Spin-d. concs. predominantly on the N atoms, while the B atoms are located in \textgreek{p}-nodal planes and the NR-NR+ bridges are leveled. [on SciFinder(R)]Chemistry of boron. C. Radical ions. XXXI. NMR and ESR spectroscopic investigations on five- and six-membered boron-nitrogen heterocycleshttps://puma.ub.uni-stuttgart.de/bibtex/25d595ba67ad1538b4e5f393886bb9fac/huebleriachuebleriac2022-06-15T11:26:56+02:00ESR boron heterocycle;NMR heterocycle;radical heterocycle;tetraazadiboracyclohexane ion ion;triazodiboracyclopentane nitrogen radical <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Heinrich Noeth" itemprop="url" href="/person/18f51f1679a0552c7891fb06bec291f73/author/0"><span itemprop="name">H. Noeth</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Winterstein" itemprop="url" href="/person/18f51f1679a0552c7891fb06bec291f73/author/1"><span itemprop="name">W. Winterstein</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Kaim" itemprop="url" href="/person/18f51f1679a0552c7891fb06bec291f73/author/2"><span itemprop="name">W. Kaim</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Hans. Bock" itemprop="url" href="/person/18f51f1679a0552c7891fb06bec291f73/author/3"><span itemprop="name">H. Bock</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Chemische Berichte</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">112 </span></span>(<span itemprop="issueNumber">7</span>):
<span itemprop="pagination">2494--2502</span></em> </span>(<em><span>1979<meta content="1979" itemprop="datePublished"/></span></em>)</span>Wed Jun 15 11:26:56 CEST 2022Chemische Berichte72494--2502Chemistry of boron. C. Radical ions. XXXI. NMR and ESR spectroscopic investigations on five- and six-membered boron-nitrogen heterocycles1121979ESR boron heterocycle;NMR heterocycle;radical heterocycle;tetraazadiboracyclohexane ion ion;triazodiboracyclopentane nitrogen radical Heterocycles I, contg. 6 pairs of \textgreek{p} electrons, are formed preferentially on reaction of bifunctional R1PX2 with monoalkylhydrazines and have planar structures, according to NMR investigations. In contrast, tetraazadiboracyclohexanes II, with 8 \textgreek{p} electrons, exhibit the twist conformation. One-electron oxidn. of I and II with AlCl3 in CH2Cl2 both yield the dark-blue, thermodn. favored radical cation III (R = R1 = Me, R = Me, R1 = NMe2), which, as a presumably planar 7 \textgreek{p}-electron system, is iso-\textgreek{p}-electronic with C6H6 radical anions. The ESR spectrum of III shows as sets of equiv. nuclei 4 N, 12 H and 2 B. Spin-d. concs. predominantly on the N atoms, while the B atoms are located in \textgreek{p}-nodal planes and the NR-NR+ bridges are leveled. [on SciFinder(R)]