Azido(2,2′-bipyridine)(η⁵-pentamethylcyclopentadienyl)iridium(III) hexafluorophosphate

Abstract

Key indicatorsSingle-crystal X-ray study T = 296 K Mean (C-C) = 0.012 Å R factor = 0.049 wR factor = 0.138 Data-to-parameter ratio = 22.6For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e. # 2005 International Union of Crystallography Printed in Great Britain -all rights reservedIn the title compound, [Ir(C 10 H 15 )(N 3 )(C 10 H 8 N 2 )]PF 6 , the linear azide ligand adopts an end-on terminal coordination mode with a relatively long Ir-N bond of 2.230 (6) Å . The azide is asymmetric in an unusual way: the azide N-N bond adjacent to the azide Ir-N bond [1.025 (12) Å ] is significantly shorter than the terminal azide N-N bond [1.282 (15) Å ], while the azide Ir-N-N bond angle is 116.4 (6) .

Azide Chemistry – An Inorganic Perspective, Part I Metal ­Azides: Overview, General Trends and Recent Developments

“…This phenomenon typically caused by the close proximity of heavy and light atoms was also reported, e.g. for SbCl(N 3 ) 2 63, NBu n 4 [Ir(N 3 )pc(acac)] (pc = phthalocyaninate(2‐))64, [IrCp*(N 3 )bipy]PF 6 65, (AsPh 4 ) 2 [Pd 2 (N 3 ) 4 Cl 2 ]58, [N(PPh 3 ) 2 ] 2 [Pd(N 3 ) 4 ]58, [Me 3 PtN 3 ] 4 66, trans ‐[Pt(Me)N 3 (PPr i 3 ) 2 ]62, (AsPh 4 ) 2 [Pt(N 3 ) 4 ]67, (AsPh 4 ) 2 [Pt(N 3 ) 6 ]58,67, (PPh 4 ) 2 [Pt(N 3 ) 6 ], (AsPh 4 ) 2 [Pt(N 3 )Cl 5 ]HCONMe 2 68, and Au(N 3 )(PPh 3 )59b.…”

Azido(η5-pentamethylcyclopentadienyl)[2-(pyridin-2-yl)phenyl]iridium(III)

“…The N1-N2 and N2-N3 bond lengths are 1.194 (3) and 1.157 (3) Å, respectively. These structural parameters are typical for [Cp*Ir III (N 3 )(L-L′)] complexes (Suzuki et al, 2009), except for [Cp*Ir(N 3 )(bpy)]PF 6 (Suzuki, 2005).…”

“…complexes (Suzuki, 2005;Suzuki et al, 2009). For instance, the Ir-N(N 3 ) bond in the bpy complex [2.230 (6) Å] was longer by ca 0.1 Å than the typical Ir-N(N 3 ) bond lengths in the other [Cp*Ir(N 3 )(L-L′)] complexes.…”