Coordination Solids Derived from Cp*M(CN)<sub>3</sub><sup>-</sup> (M = Rh, Ir)
作者:Stephen M. Contakes、Kevin K. Klausmeyer、Thomas B. Rauchfuss
DOI:10.1021/ic991037r
日期:2000.5.1
Solutions of Rh-2(OAc)(4) and Et4N[Cp*Ir(CN)(3)] react to afford crystals of the one-dimensional coordination solid Et4N[Cp*Ir(CN)(3)][Rh-2(OAc)(4)]}. This reaction is reversed by coordinating solvents such as MeCN. The structure of the polymer consists of helical anionic chains containing Rh-2(OAc)(4) units linked via two of the three CN ligands of Cp*Ir(CN)(3)(-). Use of the more Lewis acidic Rh-2(O2CCF3)(4) in place of Rh-2(OAc)(4) gave purple (Et4N)(2)[CP*Ir(CN)(3)](2)[Rh-2(O2CCF3)(4)](3)} whose insolubility is attributed to stronger Rh-NC bonds as well as the presence of cross-linking. The species [Cp*Rh(CN)(3)][Ni(en)(n)](PF6)} (n = 2, 3) crystallized from an aqueous solution of Et4N[Cp*Rh(CN)(3)] and [Ni(en)(3)](PF6)(2); (Cp*Rh(CN)(3)][Ni(en)(2)](PF6)} consists of helical chains based on cis-Ni(en)(2)(2+) units. Aqueous solutions of Et4N[Cp*Ir(CN)(3))] and AgNO3 afforded the colorless solid Ag[Cp*Ir-(CN)(3)](2)}. Recrystallization of this polymer from pyridine gave the hemipyridine adduct Ag[Ag(py)[Cp*Ir- (CN)(3)](2)} The C-13 cross-polarization magic-angle spinning NMR spectrum of the pyridine derivative reveals two distinct Cp* groups, while in the pyridine-free precursor, the Cp*'s appear equivalent. The solid-state structure of (Ag[Ag(py)][Cp*Ir(CN)(3)](2)) reveals a three-dimensional coordination polymer consisting of chains of Cp*Ir(CN)(3)(-)units linked to alternating Ag+ and Ag(py)(+) units. The network structure arises by the linking of these helices through the third cyanide group on each Ir center.
Contakes, Stephen M.; Klausmeyer, Kevin K.; Milberg, Richard M., Organometallics, 1998, vol. 17, p. 3633 - 3635
作者:Contakes, Stephen M.、Klausmeyer, Kevin K.、Milberg, Richard M.、Wilson, Scott R.、Rauchfuss, Thomas B.