ISSN:
0009-2940
Keywords:
Phosphanes, (Z)-amino(imino)-
;
1,3,5-Triaza-2,4-diphospha-1,4-pentadienes, transition metal complexes of, dynamic behavior of
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
On the Knowledge of the 1,3,5-Triaza-2,4-diphospha-1,4-pentadienesHerrn Professor Heinrich Puff zum 70. Geburtstag gewidmetNucleophilic substitution reactions of the chloro(arylimino)-phosphane 1 yield the NH-functional amino(imino)phosphanes Mes*NPNHR (R = Mes, Ad, CPh3) 2d - f. Upon further reaction with 1 they are converted into the 1,3,5-triaza-2,4-diphospha-1,4-pentadienes Mes*NPN(R)PNMes* (R = Mes, Ad) 4d, e and Mes*NPN(Mes*)PNCPh3 5. According to crystal structure determinations all compounds 4a, d, e, 5 exhibit S conformation in the solid state. In addition to the “exo-endo” arrangement of the substituents (4a, 5) in the case of 4d, e the “endo-endo” conformation is observed for the first time. In solution, 4d, e and 5 are subject to dynamic rearrangements, whose mechanism is proven by NMR studies of partially 15N-enriched samples. The reaction of 4a with NorM(CO)4 (M = Cr, Mo) or Ni(CO)4 yields the metallaazadiphosphetidine complexes 6a - c Mes*NPN(tBu)PNMes*M(CO)n [M(CO)n = Cr(CO)4, Mo(CO)4, Ni(CO)2]. The crystal structure of 6a (“exo-endo-W”) is described.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19921250208
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