2001
DOI: 10.1021/cr990321x
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Aromaticity of Phosphorus Heterocycles

Abstract: Heterophospholes 1231 D. Six-Membered Rings 1233 1. Phosphinine (3) 1233 2. Azaphosphinines 1235 3. Di-and Triphosphinines 1235 4. Hexaphosphinine (P 6 ) 1236 E. Azaphosphaullazine (4,9b-Diaza-2phosphacyclopenta[c,d]phenalene) (16) 1236 IV. "B"-and "C"-Type Bonding, Phosphorus Lone Pair in Delocalized Aromatic Systems 1236 A. Four-Membered Rings 1236 B. Five-Membered Rings 1237 1. Phosphole (4) 1237 2. 3H-1,3-Azaphospholes 1238 3. Polyphospholes 1238 C. Six-Membered Rings 1239 1. Cyclic Phosphinocarbenes 1239 … Show more

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Cited by 378 publications
(197 citation statements)
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References 177 publications
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“…[190] The definition of heteroaromaticity remains somewhat vague, but the notion reflects a group of well-correlated thermodynamic, magnetic, structural, and chemical properties. [191a] To date, this property has been unambiguously detected in several phosphorus-containing 6-p systems.…”
Section: Aromatic Systemsmentioning
confidence: 99%
See 1 more Smart Citation
“…[190] The definition of heteroaromaticity remains somewhat vague, but the notion reflects a group of well-correlated thermodynamic, magnetic, structural, and chemical properties. [191a] To date, this property has been unambiguously detected in several phosphorus-containing 6-p systems.…”
Section: Aromatic Systemsmentioning
confidence: 99%
“…An extensive series of heterophospholes incorporating O, S, Se, and N heteroatoms is known [110] and all these cyclic compounds display substantial ASE. [190] A few 2-p and 10-p aromatic systems have also been described.…”
Section: H 4 P]mentioning
confidence: 99%
“…Not only are phosphinines, with phospholes, one of the two central phosphorus/carbon heterocycles but they also serve as a reference for discussing the influence of phosphorus in aromatic structures [1] and play an increasing role as ligands in transition-metal catalysis. [2] When inspecting the various methods available for the synthesis of phosphinines, [3] it is easy to recognize that most of them yield highly substituted species with properties that are altered by the substitution scheme.…”
Section: Introductionmentioning
confidence: 99%
“…Die hervorragende Fähigkeit von Stickstoff, als p-Donor zu fungieren, ist, wenigstens zum Teil, darauf zurückzuführen, daß er die optimale planare Konfiguration mit sp 2 -Hybridisierung leicht einnehmen kann." Im Einklang damit zeigt Nyulaszi [44] unter Einbeziehung verschiedener Kriterien, dass das planare Phosphol aromatischer ist als Pyrrol; so beträgt beispielsweise der NICS-Wert für planares Phosphol À17.4 und für Pyrrol nur À14.7.…”
Section: Hintergrundunclassified
“…Ein Weg, um Planarität zu erreichen, ist die Verwendung sperriger Substituenten und der Einbau der Phosphoratome in einen Ring. [44] Zur Bestätigung wurden Ab-initio-Rechnungen an den PHCDerivaten PHC 1-3 mit Wasserstoff-, Phenyl-bzw. sperrigen 2,4,6-Tri-tert-butylphenylsubstituenten am Phosphor durchgeführt.…”
Section: Hintergrundunclassified