Syntheses, Structures, and Reactivities of {Fe−NO}<sup>6</sup> Nitrosyls Derived from Polypyridine-Carboxamide Ligands: Photoactive NO-Donors and Reagents for S-Nitrosylation of Alkyl Thiols
作者:Raman K. Afshar、Apurba K. Patra、Marilyn M. Olmstead、Pradip K. Mascharak
DOI:10.1021/ic040057c
日期:2004.9.1
The present nitrosyls, namely [(PcPy(3))Fe(NO)](ClO(4))(2) (2) and [(MePcPy(3))Fe(NO)](ClO(4))(2) (3), belong to the same (Fe-NO)6 family and exhibit (a) clean (1)H NMR spectra in CD(3)CN indicating S = 0 ground state, (b) almost linear Fe-N-O angles (177.3(5) degrees and 177.6(4) degrees for 2 and 3, respectively), and (c) N-O stretching frequencies (nu(NO)) in the range 1900-1925 cm(-)(1). The binding
Synthesis, Structure, and Properties of an Fe(II) Carbonyl [(PaPy<sub>3</sub>)Fe(CO)](ClO<sub>4</sub>): Insight into the Reactivity of Fe(II)−CO and Fe(II)−NO Moieties in Non-Heme Iron Chelates of N-Donor Ligands
作者:Raman K. Afshar、Apurba K. Patra、Eckhard Bill、Marilyn M. Olmstead、Pradip K. Mascharak
DOI:10.1021/ic060020n
日期:2006.5.1
An Fe(II) carbonylcomplex [(PaPy3)Fe(CO)](ClO4) (1) of the pentadentate ligand N,N-bis(2-pyridylmethyl)amine-N-ethyl-2-pyridine-2-carboxamide (PaPy3H, H is the dissociable amide proton) has been synthesized and structurally characterized. This Fe(II) carbonyl exhibits its nu(CO) at 1972 cm(-1), and its 1H NMR spectrum in degassed CD3CN confirms its S = 0 ground state. The bound CO in 1 is not photolabile
Iron Nitrosyls of a Pentadentate Ligand Containing a Single Carboxamide Group: Syntheses, Structures, Electronic Properties, and Photolability of NO
作者:Apurba K. Patra、John M. Rowland、Dana S. Marlin、Eckhard Bill、Marilyn M. Olmstead、Pradip K. Mascharak
DOI:10.1021/ic0301627
日期:2003.10.1
Three iron complexes of a pentadentate ligandN,N-bis(2-pyridylmethyl)amine-N-ethyl-2-pyridine-2-carboxamide (PaPy(3)H, H is the dissociable amide proton) have been synthesized. All three species, namely, two nitrosyls [(PaPy(3))Fe(NO)](ClO(4))(2) (2) and [(PaPy(3))Fe(NO)](ClO(4)) (3) and one nitro complex [(PaPy(3))Fe(NO(2))](ClO(4)) (4), have been structurally characterized. These complexes provide
Reductive Nitrosylation and Proton-Assisted Bridge Splitting of a (μ-Oxo)dimanganese(III) Complex Derived from a Polypyridine Ligand with One Carboxamide Group
作者:Kaushik Ghosh、Aura A. Eroy-Reveles、Marilyn M. Olmstead、Pradip K. Mascharak
DOI:10.1021/ic0503535
日期:2005.11.1
solution of 3 in acetonitrile produces the [Mn-NO]6 nitrosyl [Mn(PaPy3)(NO)](ClO4) (2) via reductivenitrosylation. Complexes 4-7 also afford the [Mn-NO]6 nitrosyl 2 upon reaction with NO. In the latter case, the anionic O-based ligands (such as MeO- and PhO-) act as built-in bases and promote reductivenitrosylation of the Mn(III) complexes.
Ruthenium Nitrosyls Derived from Polypyridine Ligands with Carboxamide or Imine Nitrogen Donor(s): Isoelectronic Complexes with Different NO Photolability
作者:Michael J. Rose、Apurba K. Patra、Eric A. Alcid、Marylin M. Olmstead、Pradip K. Mascharak
DOI:10.1021/ic0620945
日期:2007.3.1
coordination structures of 1 and 2 are very similar except that in 2, a carboxamido nitrogen is coordinated to the ruthenium center in place of an imine nitrogen in case of 1. In 3 and 4, the ruthenium center is coordinated to two carboxamido nitrogens in the equatorial plane and the bound NO is trans to a pyridine nitrogen (in 3) and chloride (in 4), respectively. Complexes 1-3 contain N6 donor set, and the