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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 15, Number 6
BKCSDE 15(6)
June 20, 1994

Title	Synthesis and Structure of 1,2,3,4,5-Pentamethylcyclopentadienyl-1,4-Diphenyltetraazabutadiene Complexes of Rhodium and Iridium
Author	Cheolki Paek, Jaejung Ko*, Sangook Kang, Patrick J. Carrol
Keywords
Abstract	Monomeric rhodium and iridium-diaryltetrazene complexes CpM(RNN=NNR)(Cp=1,2,3,4,5-pentamethylcyclope ntadienyl; M=Rh, Ir; R=Ph, 4-tolyl) have been synthesized from [Cp*MCl2]2(M=Rh, Ir) and 2 equiv. of [Li(THF)x]2(RN4R) in benzene. We have determined the crystal structure of (η 5-pentamethylcyclopentadienyl)diphenyltetrazene iridium by using graphite-monochromated Mo-Kα radiation. The compound was crystallized in the monoclinic space group P21/c with a=13.781(3), b=9.035(l), c=17.699(3) Å, and β=111.93(l)°. An X-ray crystal structure of complex 1 showed a short N(2)-N(3) distance (1.265 Å) consistent with the valence tautomer A with Ir(Ⅲ) rather than Ir(Ⅰ). All complexes are highly colored and decompose on irradiation at 254 nm. Electrochemical studies show that complex 1 displays a quasi-reversible reduction.
Page	432 - 436
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