Tetranuclear complexes {(μ4-TCNX)[Cu(Me3TACN)]4}(BF4)4 with TCNX=TCNE, TCNQ or TCNB (1,2,4,5-tetracyanobenzene) and Me3TACN=1,4,7-trimethyl-1,4,7-triazacyclononane

Berger, Sascha; Hartmann, Heiko; Wanner, Matthias; Fiedler, Jan; Kaim, Wolfgang

doi:10.1016/s0020-1693(00)00368-6

Cited by 17 publications

(27 citation statements)

References 21 publications

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“…[2,4,58,61,[83][84][85][86] Owing to their valence ambiguous nature, further analysis is warranted, especially structural determinations. 4+ [50] have average ñ CN absorptions of 2215 and 2254 cm À1 , [49] .…”

Section: Discussionmentioning

confidence: 99%

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Tetracyanoethylene (TCNE): The Characteristic Geometries and Vibrational Absorptions of Its Numerous Structures

2006

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Tetracyanoethylene (TCNE) undergoes numerous reactions and is reported to exist in many structural motifs. Identification of these forms and motifs can be challenging. Nonetheless, the number of nu(CN) absorptions and their frequencies provide insight with respect to the specific forms and charge on the TCNE fragment. Particularly informative is the average of the fundamental nu(CN) bands, as well as the length of the central C-C bond. This Review discusses the assignment of structure and formal charge for TCNE-containing compounds. Scrutiny of previous assignments reveals some discrepancies which are discussed, and provides a basis for further study of TCNE structure-function relationships. Several multimetal complexes with bridging [TCNE](z) units exhibit mixed valency and extensive delocalization. The scarcity of suitable model compounds, especially those with M(d(pi-pi*)) backbonding to the CN groups, have thwarted the detailed description of these valence ambiguous compounds; thus, new well-characterized polynuclear compounds are needed.

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Section: Discussionmentioning

confidence: 99%

“…4+ [50] have average ñ CN absorptions of 2215 and 2254 cm À1 , [49] . [83] The complexes [{OsHCl(CO)-A C H T U N G T R E N N U N G (PPr 3 ) 2 } 4 A C H T U N G T R E N N U N G (TCNE)], [58] [{MnCp*(CO) 2 } 4 A C H T U N G T R E N N U N G (TCNE)], [4,84] and [{RuA C H T U N G T R E N N U N G (NH 3 ) 5 …”

Section: Discussionmentioning

confidence: 99%

Tetracyanoethylene (TCNE): The Characteristic Geometries and Vibrational Absorptions of Its Numerous Structures

2006

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“…Im Prinzip könnten 13 . [83] [{OsHCl(CO)(PPr 3 ) 2 } 4 (TCNE)], [58] [{MnCp*(CO) 2 } 4 (TCNE)] [4,84] …”

Section: Schlussfolgerungen Und Ausblickunclassified

Tetracyanethylen: die charakteristischen Geometrien und Schwingungsabsorptionen seiner zahlreichen Strukturen

Miller

2006

Angewandte Chemie

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Tetracyanethylen, TCNE, geht zahlreiche chemische Reaktionen ein, und in der Literatur werden für diese Verbindung viele Strukturmotive beschrieben, deren Identifizierung oft schwierig ist. Die Zahl der $\tilde \nu $CN‐Absorptionen und die dazugehörigen Wellenzahlen geben einen Einblick in die jeweilige Struktur und Ladung des TCNE‐Fragments. Besonders die Mittelwerte der Wellenzahlen der fundamentalen νCN‐Schwingungen und die Länge der zentralen C‐C‐Bindung liefern wichtige Informationen. In diesem Aufsatz diskutieren wir die Bestimmung von Struktur und Formalladung von TCNE‐Fragmenten. Wir diskutieren Unstimmigkeiten, die sich bei Überprüfung älterer Strukturzuordnungen ergeben, und liefern eine Grundlage für zukünftige Untersuchungen der Struktur‐Eigenschafts‐Beziehungen von TCNE. Viele Komplexe mit verbrückendem [TCNE]z zeigen gemischte Valenz und ausgeprägte Delokalisierung. Der Mangel an geeigneten Modellverbindungen, besonders solchen mit M‐Rückbindung zu den CN‐Gruppen, hat bisher eine detaillierte Beschreibung dieser gemischtvalenten Verbindungen verhindert. Hierfür werden neue, gut charakterisierte mehrkernige Verbindungen benötigt.

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“…Compounds containing the radical anion TCNE ÅÀ in charge transfer or electron transfer salts or in coordination polymeric arrangements have received interest due to their electrical conductivity and especially due to their (molecular) magnetic properties [3,4]. However, the list of discrete tetranuclear complexes of l 4 , g 1 :g 1 :g 1 :g 1 -TCNE is rather short, it includes complexes [(TCNE)(ML n ) 4 ] with ML n = Mn(CO) 2 (C 5 -R 5 ) (R = H, CH 3 [5]), [Ru(NH 3 ) 5 ] 2+ [6], Os(CO)(H) Cl(PR 3 ) 2 [7], Re(CO) 4 Cl [8] and [Cu(Me 3 TACN)] + [9] (Me 3 TACN = 1, 4,7-trimethyl-1,4,7-triazacyclononane). A structurally characterized coordination polymer of l 4 , g 1 :g 1 :g 1 :g 1 -TCNE was first described by Cotton and Kim [10].…”

mentioning

confidence: 99%

“…Within our continued attempts [5][6][7][8][9] to expand the coordination chemistry of TCNX ligands [2], we have now reacted four equivalents of [Fe(CO) 2 …”

mentioning

confidence: 99%

The redox pair {(μ4-TCNE)[Fe(CO)2(C5H5)]4}4+/3+: Surprisingly small metal–ligand interaction and the first resolved EPR hyperfine structure (13C,14N,57Fe) of a tetranuclear complex with TCNE−

Maity

Schwederski

Kaim

2005

Inorganic Chemistry Communications

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Tetranuclear complexes {(μ4-TCNX)[Cu(Me3TACN)]4}(BF4)4 with TCNX=TCNE, TCNQ or TCNB (1,2,4,5-tetracyanobenzene) and Me3TACN=1,4,7-trimethyl-1,4,7-triazacyclononane

Cited by 17 publications

References 21 publications

Tetracyanoethylene (TCNE): The Characteristic Geometries and Vibrational Absorptions of Its Numerous Structures

Tetracyanoethylene (TCNE): The Characteristic Geometries and Vibrational Absorptions of Its Numerous Structures

Tetracyanethylen: die charakteristischen Geometrien und Schwingungsabsorptionen seiner zahlreichen Strukturen

The redox pair {(μ4-TCNE)[Fe(CO)2(C5H5)]4}4+/3+: Surprisingly small metal–ligand interaction and the first resolved EPR hyperfine structure (13C,14N,57Fe) of a tetranuclear complex with TCNE−

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