Reaktionen an komplexgebundenen Liganden, XXXIX. Reaktionen der niedrigvalenten Azido-Komplexe NEt4[CpMn(CO)2N3] und [CpFe(cdpe)N3] mit Elektrophilen und 1,3-DipolarophiIen (cdpe = cis-1,2-Bis(diphenylphosphino)ethen) / Reactions of Complex Bound Ligands, XXXIX. Reactions of the Low Valent Azido Complexes NEt4[CpMn(CO)2N3] and [CpFe(cdpe)N3] with Electrophiles and 1,3-Dipolarophiles (cdpe = cis-1,2-Bis(diphenylphosphino)ethen)

Abstract

Reactions of the low valent azido complex NEt4[CpMn(CO)2N3] (1) with electrophiles preferably give the dinitrogen complex [CpMn(CO)2N2] (2). Thus, 2 forms when 1 is reacted with NOBF4, NO2BF4 or HCl/THF. respectively. 2 forms also if 1 is reacted with the 1,3-dipolarophile CI3C-CN. The reaction of 1 with CH3I. however, gives the methylamine complex [CpMn(CO)2NH2CH3], presumably via methylazido, -nitrene and -aminyl interm ediates. Cycloadditions could be achieved with the isoelectronic [CpFe(cdpe)N3] (3); 3 yields the corresponding 2-triazolato-4,5-dialkylester complexes 4 when reacted with RO2C-C=C-CO2R(4a: R = Me; 4b: R = Et). The ethyl derivative was characterized by X-ray structure analysis.