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The continuing story of dinitrogen activation

Identifieur interne : 001792 ( Istex/Corpus ); précédent : 001791; suivant : 001793

The continuing story of dinitrogen activation

Auteurs : Michael D. Fryzuk ; Samuel A. Johnson

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RBID : ISTEX:FA3EBFB349EBB636343C7125EC7C76B414E2C451

English descriptors

Abstract

Abstract: This review attempts to survey the recent literature concerning the coordination chemistry and the reactivity patterns of metal–dinitrogen complexes. In order that this work may stand alone, a certain amount of background information is included; however, the emphasis is on synthesis and reactivity patterns of recently discovered dinitrogen complexes. In addition, some effort is made to discuss new trends in dinitrogen chemistry as well as to point out underdeveloped topics in this area.

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DOI: 10.1016/S0010-8545(00)00264-2

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ISTEX:FA3EBFB349EBB636343C7125EC7C76B414E2C451

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<note type="content">Fig. 1: Schematic of the FeMo cofactor of FeMo nitrogenase.</note>
<note type="content">Scheme 1:</note>
<note type="content">Fig. 2: Synergistic bonding in end-on dinitrogen complexes involves σ-donation from the N2 unit to the metal and π-back-bonding from two orthogonal metal orbitals to the π*-orbitals of the N2 moiety. This back-bonding can also be described by the contribution of resonance structure B to the σ-bonded structure A.</note>
<note type="content">Scheme 2:</note>
<note type="content">Scheme 3:</note>
<note type="content">Scheme 4:</note>
<note type="content">Scheme 5:</note>
<note type="content">Fig. 3: The dinitrogen complex shown in (a) co-crystallized with Cp2Ti(diglyme). The charge on the individual fragments is unknown; the dinitrogen complex may be uninegative. Removal of a fragment known to form a THF adduct produces the hypothetical fragment shown in (b), which resembles the bonding mode shown in Eq. (7).</note>
<note type="content">Scheme 6:</note>
<note type="content">Scheme 7:</note>
<note type="content">Scheme 8:</note>
<note type="content">Scheme 9:</note>
<note type="content">Scheme 10:</note>
<note type="content">Scheme 11:</note>
<note type="content">Scheme 12:</note>
<note type="content">Scheme 13:</note>
<note type="content">Scheme 14:</note>
<note type="content">Table 1: NN bond lengths and stretching frequencies for NN triple, double, and single bonds, as well as a selection of dinitrogen compounds</note>
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<ce:title>The continuing story of dinitrogen activation</ce:title>
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<ce:author>
<ce:given-name>Michael D</ce:given-name>
<ce:surname>Fryzuk</ce:surname>
<ce:cross-ref refid="CORR1">*</ce:cross-ref>
<ce:e-address>fryzuk@chem.ubc.ca</ce:e-address>
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<ce:author>
<ce:given-name>Samuel A</ce:given-name>
<ce:surname>Johnson</ce:surname>
</ce:author>
<ce:affiliation>
<ce:textfn>Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1</ce:textfn>
</ce:affiliation>
<ce:correspondence id="CORR1">
<ce:label>*</ce:label>
<ce:text>Corresponding author. Tel.: +1-604-8222897; fax: +1-604-8222847</ce:text>
</ce:correspondence>
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<ce:date-received day="21" month="9" year="1999"></ce:date-received>
<ce:date-accepted day="7" month="1" year="2000"></ce:date-accepted>
<ce:abstract>
<ce:section-title>Abstract</ce:section-title>
<ce:abstract-sec>
<ce:simple-para>This review attempts to survey the recent literature concerning the coordination chemistry and the reactivity patterns of metal–dinitrogen complexes. In order that this work may stand alone, a certain amount of background information is included; however, the emphasis is on synthesis and reactivity patterns of recently discovered dinitrogen complexes. In addition, some effort is made to discuss new trends in dinitrogen chemistry as well as to point out underdeveloped topics in this area.</ce:simple-para>
</ce:abstract-sec>
</ce:abstract>
<ce:keywords class="keyword">
<ce:section-title>Keywords</ce:section-title>
<ce:keyword>
<ce:text>Dinitrogen</ce:text>
</ce:keyword>
<ce:keyword>
<ce:text>Nitrogen</ce:text>
</ce:keyword>
<ce:keyword>
<ce:text>Nitrogen fixation</ce:text>
</ce:keyword>
<ce:keyword>
<ce:text>Nitrogenase</ce:text>
</ce:keyword>
<ce:keyword>
<ce:text>Metal complexes</ce:text>
</ce:keyword>
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<affiliation>Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1</affiliation>
<affiliation>E-mail: fryzuk@chem.ubc.ca</affiliation>
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<abstract lang="en">Abstract: This review attempts to survey the recent literature concerning the coordination chemistry and the reactivity patterns of metal–dinitrogen complexes. In order that this work may stand alone, a certain amount of background information is included; however, the emphasis is on synthesis and reactivity patterns of recently discovered dinitrogen complexes. In addition, some effort is made to discuss new trends in dinitrogen chemistry as well as to point out underdeveloped topics in this area.</abstract>
<note type="content">Fig. 1: Schematic of the FeMo cofactor of FeMo nitrogenase.</note>
<note type="content">Scheme 1: </note>
<note type="content">Fig. 2: Synergistic bonding in end-on dinitrogen complexes involves σ-donation from the N2 unit to the metal and π-back-bonding from two orthogonal metal orbitals to the π*-orbitals of the N2 moiety. This back-bonding can also be described by the contribution of resonance structure B to the σ-bonded structure A.</note>
<note type="content">Scheme 2: </note>
<note type="content">Scheme 3: </note>
<note type="content">Scheme 4: </note>
<note type="content">Scheme 5: </note>
<note type="content">Fig. 3: The dinitrogen complex shown in (a) co-crystallized with Cp2Ti(diglyme). The charge on the individual fragments is unknown; the dinitrogen complex may be uninegative. Removal of a fragment known to form a THF adduct produces the hypothetical fragment shown in (b), which resembles the bonding mode shown in Eq. (7).</note>
<note type="content">Scheme 6: </note>
<note type="content">Scheme 7: </note>
<note type="content">Scheme 8: </note>
<note type="content">Scheme 9: </note>
<note type="content">Scheme 10: </note>
<note type="content">Scheme 11: </note>
<note type="content">Scheme 12: </note>
<note type="content">Scheme 13: </note>
<note type="content">Scheme 14: </note>
<note type="content">Table 1: NN bond lengths and stretching frequencies for NN triple, double, and single bonds, as well as a selection of dinitrogen compounds</note>
<subject lang="en">
<genre>Keywords</genre>
<topic>Dinitrogen</topic>
<topic>Nitrogen</topic>
<topic>Nitrogen fixation</topic>
<topic>Nitrogenase</topic>
<topic>Metal complexes</topic>
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<number>200–202</number>
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