Please use this identifier to cite or link to this item:
|Title:||Syntheses, structures, and electrochemistry of polynuclear CuI, AgI, and PtII complexes bearing ferrocenyl group||Authors:||Yip, J.H.K.
|Issue Date:||14-Apr-2002||Citation:||Yip, J.H.K., Wu, J., Wong, K.-Y., Yeung, K.-W., Vittal, J.J. (2002-04-14). Syntheses, structures, and electrochemistry of polynuclear CuI, AgI, and PtII complexes bearing ferrocenyl group. Organometallics 21 (8) : 1612-1621. ScholarBank@NUS Repository. https://doi.org/10.1021/om010998m||Abstract:||Three polynuclear complexes, [Pt2 II(dppm)2(μ-η1:η 1-HC=CFc)Cl2] (1), [AgI 3(dppm)3(μ3-η1 C≡CFc)]·2CF3SO3 (2·2CF3SO3), and [Cu3 I(dppm)3(μ3-η1 -C≡CFc)2]·PF6 (3·PF6), were synthesized and characterized using single-crystal X-ray diffraction, UV-vis spectroscopy, and voltammetry (dppm = bis(diphenylphosphino)methane; Fc = ferrocenyl). Compound 1 is an A-frame complex in which two PtII ions are bridged by two dppm and one ethynylferrocene. Both 2·2CF3SO3 and 3·PF6 are composed of trimetallic Ag3 I and Cu3 I cores bridged by three dppm and capped with one and two ferrocenylacetylides, respectively. All complexes exhibit reversible Fc oxidation in their cyclic voltammograms (CV), ranging from -48 ± 10 to 235 ± 10 mV vs Ag/AgNO3 (0.1 M). The reduction potential difference between silver and copper complexes is mostly due to intramoleuclar. electrostatic interactions. A weak intervalence charge-transfer transition at 1250 nm arising from the mixed-valence 32+ is observed in the solution near-infrared absorption spectrum of a mixture of 3·PF6 and ferrocenium hexafluo-rophosphate (Cp2FePF6). Cyclic and differential pulse volatmmograms of 3·PF6 show two reversible Fc oxidations separated by 110 ± 14 mV, giving a comproportionation constant Kc of 77 ± 30. The stability of the mixed-valence complex 32+ arises mainly from the reduction of electrostatic repulsion and statistical distribution.||Source Title:||Organometallics||URI:||http://scholarbank.nus.edu.sg/handle/10635/95020||ISSN:||02767333||DOI:||10.1021/om010998m|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 14, 2020
WEB OF SCIENCETM
checked on Feb 6, 2020
checked on Feb 16, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.