ISSN:
0009-2940
Keywords:
[n + 2] Cycloadditions
;
Calculations, ab initio
;
Phosphenium ions
;
1,3,2,4-Diazadiphosphetidinylium salts
;
Tetrazaphospholylium salts
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
[n + 2] Cycloaddition Reactions of the (Arylimino)phosphenium Ion, [P≡NAr]+-Kationic PN Heterocycles with Unusual Structure and Bonding SituationThe iminophosphenium ion [P≡NAr]+ (Ar=2,4,6-tBu3C6H2) (1) reacts with aminoiminophosphanes R2N-P=NtBu (R=iPr, Me3Si) (2) and alkyl azides RN3 (R=tBu, Et3C) (6) to yield the corresponding [n + 2] cycloadducts [R2NP (NAr)P(NtBu)+ (3) and [PN(Ar)NNN(R)]+ (7), respectively. Single-crystal X-ray diffraction studies show that 3a can be considered as an intramolecular donor-acceptor complex while 7 can be regarded as a cyclic diaminophosphenium cation coupled to a diimine fragment, which is in accordance with results of ab initio calculations.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19931260703
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