o-Semiquinonic PCP-pincer nickel complexes with alkyl substituents: versatile coordination sphere dynamics

2008 ◽  
pp. 2849 ◽  
Author(s):  
Konstantin A. Kozhanov ◽  
Michael P. Bubnov ◽  
Vladimir K. Cherkasov ◽  
Nina N. Vavilina ◽  
Larisa Yu. Efremova ◽  
...  
Keyword(s):  
Coordination Sphere ◽  
Nickel Complexes ◽  
Pcp Pincer

New Bond-Valence Sum Model

1997 ◽  
Vol 53 (6) ◽  
pp. 885-894 ◽  
Author(s):  
J. P. Naskar ◽  
S. Hati ◽  
D. Datta
Keyword(s):  
Oxidation State ◽  
Coordination Sphere ◽  
Metal Ion ◽  
Nickel Complexes ◽  
Bond Valence ◽  
Oxidation States ◽  
Linear Variation ◽  
Axial Bond ◽  
Inorganic Complexes ◽  
Bond Valence Sum

A new expression is devised empirically to accommodate zero and some negative oxidation states in the bond-valence sum approach. The method is worked out in detail for a number of homoleptic copper and nickel complexes of various coordinating atoms in several oxidation states of the metals. An implication of the expression is a linear variation between 1/r eq and 1/r ax in octahedral MX 6 moieties, where r eq and r ax are, respectively, the average equatorial and axial bond lengths. This is verified in Cu2+ X 6 chromophores for X = F, O, N and S. The usefulness of the new expression in assessing the compatibility of a coordination sphere with an oxidation state of a metal ion is demonstrated by exemplary applications to some inorganic complexes, azurin and urease.

Activation of white phosphorus in the coordination sphere of nickel complexes with σ-donor ligands

2005 ◽  
Vol 54 (4) ◽  
pp. 942-947 ◽  
Author(s):  
Yu. G. Budnikova ◽  
D. I. Tazeev ◽  
A. G. Kafiyatullina ◽  
D. G. Yakhvarov ◽  
V. I. Morozov ◽  
...  
Keyword(s):  
Coordination Sphere ◽  
Nickel Complexes ◽  
White Phosphorus ◽  
Donor Ligands

Novel structurally characterized o-semiquinonato PCP-pincer nickel complexes

Polyhedron ◽  
2009 ◽  
Vol 28 (13) ◽  
pp. 2555-2558 ◽  
Author(s):  
Konstantin A. Kozhanov ◽  
Michael P. Bubnov ◽  
Nina N. Vavilina ◽  
Larisa Yu. Efremova ◽  
Georgy K. Fukin ◽  
...  
Keyword(s):  
Nickel Complexes ◽  
Pcp Pincer

EPR study of intramolecular dynamics in o-semiquinonic nickel complexes with PCP-pincer ligand in solution

2004 ◽  
pp. 2957 ◽  
Author(s):  
Konstantin A. Kozhanov ◽  
Michael P. Bubnov ◽  
Vladimir K. Cherkasov ◽  
Georgy K. Fukin ◽  
Gleb A. Abakumov
Keyword(s):  
Nickel Complexes ◽  
Intramolecular Dynamics ◽  
Pincer Ligand ◽  
Pcp Pincer

Novel access to carbodiphosphoranes in the coordination sphere of group 10 metals: template synthesis and protonation of PCP pincer carbodiphosphorane complexes of C(dppm)2

2012 ◽  
Vol 41 (12) ◽  
pp. 3503 ◽  
Author(s):  
Christian Reitsamer ◽  
Silvia Stallinger ◽  
Walter Schuh ◽  
Holger Kopacka ◽  
Klaus Wurst ◽  
...  
Keyword(s):  
Coordination Sphere ◽  
Template Synthesis ◽  
Group 10 ◽  
Pcp Pincer ◽  
Group 10 Metals

Transformation of white phosphorus in the coordination sphere of nickel complexes with σ-donating ligands

2003 ◽  
Vol 52 (11) ◽  
pp. 2419-2423 ◽  
Author(s):  
Yu. H. Budnikova ◽  
A. G. Kafiyatullina ◽  
A. S. Balueva ◽  
R. M. Kuznetsov ◽  
V. I. Morozov ◽  
...  
Keyword(s):  
Coordination Sphere ◽  
Nickel Complexes ◽  
White Phosphorus

scholarly journals New nickel complexes with an S4 coordination sphere; synthesis, characterization and reactivity towards nickel and iron compounds

2004 ◽  
Vol 357 (9) ◽  
pp. 2687-2693 ◽  
Author(s):  
Johanna A.W Verhagen ◽  
Michela Beretta ◽  
Anthony L Spek ◽  
Elisabeth Bouwman
Keyword(s):  
Coordination Sphere ◽  
Nickel Complexes ◽  
Iron Compounds

Spatiotemporal Control of Amide Radicals During Photocatalysis

2020 ◽  
Author(s):  
Shogo Mori ◽  
Takahiro Aoki ◽  
Kaliyamoorthy Selvam ◽  
Shunichi Fukuzumi ◽  
Jieun Jung ◽  
...  
Keyword(s):  
Organic Synthesis ◽  
Nickel Complex ◽  
Nickel Complexes ◽  
Semiconductor Material ◽  
Radical Reactions ◽  
Substitution Reactions ◽  
Carbon Neutrality ◽  
Spatiotemporal Control ◽  
Scalable Production ◽  
Salt Waste

Despite the continuing popularity of radical reactions in organic synthesis, much remains to be explored in this area. Herein, we describe how spatiotemporal control can be exerted over the formation and reactivity of divergent exchangeable formamide radicals using nickel complexes with a semiconductor material (TiO<sub>2</sub>) under irradiation from near-UV–Vis light. Depending on the bipyridine ligand used and the quantity of the nickel complex that is hybridized on or nonhydridized over the TiO<sub>2</sub> surface, these radicals selectively undergo substitution reactions at the carbon center of carbon–bromine bonds that proceed via three different pathways. As the scalable production of formamides from CO<sub>2</sub> does not produce salt waste, these methods could add a new dimension to the search for carbon neutrality through the indirect incorporation of CO<sub>2</sub> into organic frameworks.

Coordination state of cobalt(II) ions in solution and on a sulphonated organic polymer

1979 ◽  
Vol 44 (8) ◽  
pp. 2330-2337 ◽  
Author(s):  
Jindřiška Maternová ◽  
Anastas A. Andreev ◽  
Dimitrii M. Shopov ◽  
Karel Setínek
Keyword(s):  
Acetic Acid ◽  
Coordination Sphere ◽  
Glacial Acetic Acid ◽  
Organic Polymer ◽  
Octahedral Complex ◽  
Coordination State ◽  
Tetrahedral Symmetry ◽  
Liquid Acid ◽  
Homogeneous Phase ◽  
Bromide Ion

It was found spectroscopically that cobalt(II) acetate dissolved in glacial acetic acid forms the octahedral complex [Co(OAc)2(HOAc)4] which in the presence of bromide ions gives the octahedral [Co(OAc)Br(HOAc)4] and tetrahedral bromo(acetate)cobalt(II) complexes with the higher number of Br- ions. When attached to an organic polymer cobalt(II) ions are bonded in the form of octahedral [Co(H2O)6]2+ cations which form with acetic acid similar complexes as in homogeneous phase and are able to coordinate one bromide ion. Drying the copolymer possessing octahedral hexaaquocobalt(II) cations leads to tetrahedral aquocomplexes which are solvated by gaseous acetic acid and converted into the acetate complexes with the liquid acid. The latter contain the acid in the inner coordination sphere and have tetrahedral symmetry.

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