Synthesis, Structures, and Spectroscopic Properties of 3‐Aryl‐5‐(2‐pyridyl)pyrazoles and Related Pyrazoles
Identifieur interne : 000762 ( Main/Exploration ); précédent : 000761; suivant : 000763Synthesis, Structures, and Spectroscopic Properties of 3‐Aryl‐5‐(2‐pyridyl)pyrazoles and Related Pyrazoles
Auteurs : Björn Schowtka [Allemagne] ; Christoph Müller [Allemagne] ; Helmar Görls [Allemagne] ; Matthias Westerhausen [Allemagne]Source :
- Zeitschrift für anorganische und allgemeine Chemie [ 0044-2313 ] ; 2014-04.
Abstract
3‐Aryl‐5‐(2‐pyridyl)pyrazoles and related compounds are easily accessible via the reaction of the appropriate 1,3‐diketone with hydrazine hydrate. The central pyrazole rings show a far‐reaching equalization of the bond lengths. In the crystalline state dimeric and strand‐like structures are observed due to the formation of intermolecular N–H···N hydrogen bridges between the pyrazole N–H functionality and a pyrazole or pyridyl base. The structures mainly depend on the steric demand of the aryl groups. Planar 3‐aryl‐5‐(2‐pyridyl)pyrazoles also show π stacking reducing the solubility in common organic solvents.
Url:
DOI: 10.1002/zaac.201300637
Affiliations:
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level="j" type="main">Zeitschrift für anorganische und allgemeine Chemie</title><title level="j" type="sub">Dedicated to Professor Reinhard Nesper on the Occasion of His 65th Birthday</title><title level="j" type="alt">ZEITSCHRIFT FUER ANORGANISCHE UND ALLGEMEINE CHEMIE</title><idno type="ISSN">0044-2313</idno><idno type="eISSN">1521-3749</idno><imprint><biblScope unit="vol">640</biblScope><biblScope unit="issue">5</biblScope><biblScope unit="page" from="916">916</biblScope><biblScope unit="page" to="925">925</biblScope><biblScope unit="page-count">10</biblScope><publisher>WILEY‐VCH Verlag</publisher><pubPlace>Weinheim</pubPlace><date type="published" when="2014-04">2014-04</date></imprint><idno type="ISSN">0044-2313</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0044-2313</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">3‐Aryl‐5‐(2‐pyridyl)pyrazoles and related compounds are easily accessible via the reaction of the appropriate 1,3‐diketone with hydrazine hydrate. The central pyrazole rings show a far‐reaching equalization of the bond lengths. In the crystalline state dimeric and strand‐like structures are observed due to the formation of intermolecular N–H···N hydrogen bridges between the pyrazole N–H functionality and a pyrazole or pyridyl base. The structures mainly depend on the steric demand of the aryl groups. Planar 3‐aryl‐5‐(2‐pyridyl)pyrazoles also show π stacking reducing the solubility in common organic solvents.</div></front></TEI><affiliations><list><country><li>Allemagne</li></country></list><tree><country name="Allemagne"><noRegion><name sortKey="Schowtka, Bjorn" sort="Schowtka, Bjorn" uniqKey="Schowtka B" first="Björn" last="Schowtka">Björn Schowtka</name></noRegion><name sortKey="Gorls, Helmar" sort="Gorls, Helmar" uniqKey="Gorls H" first="Helmar" last="Görls">Helmar Görls</name><name sortKey="Muller, Christoph" sort="Muller, Christoph" uniqKey="Muller C" first="Christoph" last="Müller">Christoph Müller</name><name sortKey="Westerhausen, Matthias" sort="Westerhausen, Matthias" uniqKey="Westerhausen M" first="Matthias" last="Westerhausen">Matthias Westerhausen</name><name sortKey="Westerhausen, Matthias" sort="Westerhausen, Matthias" uniqKey="Westerhausen M" first="Matthias" last="Westerhausen">Matthias Westerhausen</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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