[N+2]-CYCLOADDITION REACTIONS OF THE (ARYLIMINO)PHOSPHENIUM ION, [PNAR]+ - KATIONIC PN HETEROCYCLES WITH UNUSUAL STRUCTURE AND BONDING SITUATION

DAVID G, NIECKE E, NIEGER M, VONDERGONNA V, Schoeller W (1993)
CHEMISCHE BERICHTE-RECUEIL 126(7): 1513-1517.

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Abstract
The 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.
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DAVID G, NIECKE E, NIEGER M, VONDERGONNA V, Schoeller W. [N+2]-CYCLOADDITION REACTIONS OF THE (ARYLIMINO)PHOSPHENIUM ION, [PNAR]+ - KATIONIC PN HETEROCYCLES WITH UNUSUAL STRUCTURE AND BONDING SITUATION. CHEMISCHE BERICHTE-RECUEIL. 1993;126(7):1513-1517.
DAVID, G., NIECKE, E., NIEGER, M., VONDERGONNA, V., & Schoeller, W. (1993). [N+2]-CYCLOADDITION REACTIONS OF THE (ARYLIMINO)PHOSPHENIUM ION, [PNAR]+ - KATIONIC PN HETEROCYCLES WITH UNUSUAL STRUCTURE AND BONDING SITUATION. CHEMISCHE BERICHTE-RECUEIL, 126(7), 1513-1517.
DAVID, G., NIECKE, E., NIEGER, M., VONDERGONNA, V., and Schoeller, W. (1993). [N+2]-CYCLOADDITION REACTIONS OF THE (ARYLIMINO)PHOSPHENIUM ION, [PNAR]+ - KATIONIC PN HETEROCYCLES WITH UNUSUAL STRUCTURE AND BONDING SITUATION. CHEMISCHE BERICHTE-RECUEIL 126, 1513-1517.
DAVID, G., et al., 1993. [N+2]-CYCLOADDITION REACTIONS OF THE (ARYLIMINO)PHOSPHENIUM ION, [PNAR]+ - KATIONIC PN HETEROCYCLES WITH UNUSUAL STRUCTURE AND BONDING SITUATION. CHEMISCHE BERICHTE-RECUEIL, 126(7), p 1513-1517.
G. DAVID, et al., “[N+2]-CYCLOADDITION REACTIONS OF THE (ARYLIMINO)PHOSPHENIUM ION, [PNAR]+ - KATIONIC PN HETEROCYCLES WITH UNUSUAL STRUCTURE AND BONDING SITUATION”, CHEMISCHE BERICHTE-RECUEIL, vol. 126, 1993, pp. 1513-1517.
DAVID, G., NIECKE, E., NIEGER, M., VONDERGONNA, V., Schoeller, W.: [N+2]-CYCLOADDITION REACTIONS OF THE (ARYLIMINO)PHOSPHENIUM ION, [PNAR]+ - KATIONIC PN HETEROCYCLES WITH UNUSUAL STRUCTURE AND BONDING SITUATION. CHEMISCHE BERICHTE-RECUEIL. 126, 1513-1517 (1993).
DAVID, G, NIECKE, E, NIEGER, M, VONDERGONNA, V, and Schoeller, Wolfgang. “[N+2]-CYCLOADDITION REACTIONS OF THE (ARYLIMINO)PHOSPHENIUM ION, [PNAR]+ - KATIONIC PN HETEROCYCLES WITH UNUSUAL STRUCTURE AND BONDING SITUATION”. CHEMISCHE BERICHTE-RECUEIL 126.7 (1993): 1513-1517.
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