TY - JOUR
T1 - Crystal structures of (azido)(pentamethylcyclopentadienyl)iridium(III) complexes containing various types of bidentate ligands
AU - Suzuki, Takayoshi
AU - Kotera, Mai
AU - Takayama, Asuka
AU - Kojima, Masaaki
N1 - Funding Information:
This work was supported by Grant-in-Aid for Scientific Research No. 20550064 from the Ministry of Education, Culture, Sports, Science, and Technology, Japan.
PY - 2009/7/6
Y1 - 2009/7/6
N2 - Several (azido)iridium(III) complexes having a pentamethylcyclopentadienyl (Cp*) group, [Cp*Ir(N3)2(Ph2Ppy-κP)] (1: Ph2Ppy = 2-diphenylphosphinopyridine), [Cp*Ir(N3)(Ph2Ppy-κP,κN)]CF3SO3 (2), [Cp*Ir(N3)(dmpm)]PF6 (3: dmpm = bis(dimethylphosphino)methane), [Cp*Ir(N3)(Ph2Pqn)]PF6·CH3OH (4·CH3OH: Ph2Pqn = 8-diphenylphosphinoquinoline), and [Cp*Ir(N3)(pybim)] (5: Hpybim = 2-(2-pyridyl)benzimidazole) have been prepared and their crystal structures have been analyzed by X-ray diffraction. In complex 1, the Ph2Ppy ligand is only coordinated via the P atom (-κP), while in 2 it acts as a bidentate ligand through the P and N atoms (-κP,κN) to form a four-membered chelate ring. Comparing the structural parameters of the chelate ring in 2 with those of a similar five-membered chelate ring formed by Ph2Pqn in 4, it became apparent that the angular distortion in the Ph2Ppy-κP,κN ring was remarkable, although the Ir-P and Ir-N bonds in the Ph2Ppy-κP,κN ring were not elongated very much from the corresponding bonds in the Ph2Pqn-κP,κN ring. In the pybim complex 5, the five-membered chelate ring was coplanar with the pyridine and benzimidazolyl rings. With the related (azido)iridium(III) complexes analyzed previously, comparison of the structural parameters of the Ir-N3 moiety in [Cp*IrIII(N3)(L-L′)]+/0 complexes reveals an anomalous feature of the 2,2′-bipyridyl (bpy) complex, [Cp*Ir(N3)(bpy)]PF6.
AB - Several (azido)iridium(III) complexes having a pentamethylcyclopentadienyl (Cp*) group, [Cp*Ir(N3)2(Ph2Ppy-κP)] (1: Ph2Ppy = 2-diphenylphosphinopyridine), [Cp*Ir(N3)(Ph2Ppy-κP,κN)]CF3SO3 (2), [Cp*Ir(N3)(dmpm)]PF6 (3: dmpm = bis(dimethylphosphino)methane), [Cp*Ir(N3)(Ph2Pqn)]PF6·CH3OH (4·CH3OH: Ph2Pqn = 8-diphenylphosphinoquinoline), and [Cp*Ir(N3)(pybim)] (5: Hpybim = 2-(2-pyridyl)benzimidazole) have been prepared and their crystal structures have been analyzed by X-ray diffraction. In complex 1, the Ph2Ppy ligand is only coordinated via the P atom (-κP), while in 2 it acts as a bidentate ligand through the P and N atoms (-κP,κN) to form a four-membered chelate ring. Comparing the structural parameters of the chelate ring in 2 with those of a similar five-membered chelate ring formed by Ph2Pqn in 4, it became apparent that the angular distortion in the Ph2Ppy-κP,κN ring was remarkable, although the Ir-P and Ir-N bonds in the Ph2Ppy-κP,κN ring were not elongated very much from the corresponding bonds in the Ph2Pqn-κP,κN ring. In the pybim complex 5, the five-membered chelate ring was coplanar with the pyridine and benzimidazolyl rings. With the related (azido)iridium(III) complexes analyzed previously, comparison of the structural parameters of the Ir-N3 moiety in [Cp*IrIII(N3)(L-L′)]+/0 complexes reveals an anomalous feature of the 2,2′-bipyridyl (bpy) complex, [Cp*Ir(N3)(bpy)]PF6.
KW - 2-(2-Pyridyl)benzimidazolate
KW - 2-Pyridylphosphine
KW - 8-Quinolylphosphine
KW - Crystal structures
KW - Iridium(III) azido complexes
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U2 - 10.1016/j.poly.2009.04.010
DO - 10.1016/j.poly.2009.04.010
M3 - Article
AN - SCOPUS:66949143222
VL - 28
SP - 2287
EP - 2293
JO - Polyhedron
JF - Polyhedron
SN - 0277-5387
IS - 11
ER -