Diiron Dithiolate Hydrides Complemented with Proton‐Responsive Phosphine–Amine Ligands

Structures, protonation, and electrochemical properties of diiron dithiolate complexes containing pyridyl-phosphine ligands.

Diiron complexes containing pyridyl-phosphine ligands, that is, (mu-pdt)[Fe(2)(CO)(5)L] (pdt = S(CH(2))(3)S, L = Ph(2)PCH(2)Py, Ph(2)PPy, ) and (micro-pdt)[Fe(CO)(2)(PMe(3))][Fe(CO)(2)L] (L = Ph(2)PCH(2)Py, Ph(2)PPy, ) were prepared as model complexes of the [FeFe]-hydrogenase active site. Protonation of and by HOTf afforded the pyridyl-nitrogen protonated products [H(N)][OTf] and [H(N)][OTf], ...

The one-electron reduction of dithiolate and diselenolate ligands.

Herein we present an assessment to determine which of nine well-established DFT functionals best describes the reduction of C2H2Se2(-)˙. In addition, we have also studied the effects of changing the substituents bound to the alkene functional group of dithiolene and diselenolene ligands. Such ligands are important due to their unique electrochemical and physical properties when ligated to metal...

Reactions of Diiron μ-Aminocarbyne Complexes Containing Nitrile Ligands

Bis[1-(3-cyano­benz­yl)pyridinium] bis­(1,2-dicyano­ethene-1,2-dithiol­ato)nickelate(II)

In the ionic title complex, (C(13)H(11)N(2))(2)[Ni(C(4)N(2)S(2))(2)], the Ni(II) ion is located on an inversion centre so the asymmetric unit contains one-half [Ni(mnt)(2)](2-) dianion (mnt(2-) is maleonitrile-dithiolate) and one 1-(3-cyano-benz-yl)pyridinium cation ([CNBzPy](+)). The Ni(II) ion in the [Ni(mnt)(2)](2-) anion is coordinated by four S atoms of two mnt(2-) ligands, and exhibits sq...

Groups with a Complemented Presentation

Let G be a group given by a presentation. We study the decomposition of the elements of G as quotients of “positive” elements (the elements of G that can be expressed without using the inverses of the generators) in the special case when the presentation satisfies some syntactical condition. This approach works in particular for Artin’s braid groups, and results in a very simple quadratic algor...