A high-spin square planar iron(ii)-siloxide and its tetrahedral allogon – structural and spectroscopic models of Fe-zeolite sites

2017 ◽  
Vol 53 (57) ◽  
pp. 8081-8084 ◽  
Author(s):  
D. Pinkert ◽  
M. Keck ◽  
S. Ghassemi Tabrizi ◽  
C. Herwig ◽  
F. Beckmann ◽  
...  
Keyword(s):  
High Spin ◽  
Molecular Model ◽  
Unique Structure ◽  
Square Planar ◽  
Fe Sites

The so far closest molecular model for the α-Fe sites in Fe-zeolites faithfully mimics the unique structure and spectroscopic features.

Nickel(II) complexes of some o-hydroxyarylcarbonyl compounds. II. Some 5-substituted 2-hydroxyaryl ketones

1968 ◽  
Vol 21 (4) ◽  
pp. 907 ◽  
Author(s):  
DP Graddon ◽  
GM Mockler
Keyword(s):  
High Spin ◽  
Planar Structure ◽  
Monomeric Form ◽  
Equilibrium Studies ◽  
Molecular Weights ◽  
Square Planar ◽  
Two Stages

Nickel(11) complexes of the type NiL2Bn have been prepared where L = 2-hydroxy-5-methylacetophenone, 2-hydroxy-5-methylbenzophenone, or 5-chloro-2-hydroxybenzophenone; B = H2O or 4-methylpyridine; n = 2 or 0. The properties of these compounds closely resemble those of the unsubstituted compounds described in Part I. Molecular weights of the anhydrous compounds NiL, indicate a monomer-polymer equilibrium in non-donor solvents, the solute being almost wholly monomeric at concentrations below 10-2M. Equilibrium studies in 2.5M 10-8M solution show that NiL2 reacts with 4-methylpyridine in two stages with a five-coordinate intermediate NiL2B, analogous to corresponding copper(11) complexes. The properties of the monomeric form of NiL, are consistent with a high-spin square-planar structure.

A Dinuclear Molecular Iron(II) Silicate with Two High-Spin Square-Planar FeO4Units

2013 ◽  
Vol 52 (19) ◽  
pp. 5155-5158 ◽  
Author(s):  
Denise Pinkert ◽  
Serhiy Demeshko ◽  
Fabian Schax ◽  
Beatrice Braun ◽  
Franc Meyer ◽  
...  
Keyword(s):  
High Spin ◽  
Square Planar

Synthesis and Electronic Structure of Neutral Square-Planar High-Spin Iron(II) Complexes Supported by a Dianionic Pincer Ligand

2019 ◽  
Vol 58 (2) ◽  
pp. 1252-1266 ◽  
Author(s):  
Brett M. Hakey ◽  
Jonathan M. Darmon ◽  
Yu Zhang ◽  
Jeffrey L. Petersen ◽  
Carsten Milsmann
Keyword(s):  
Electronic Structure ◽  
High Spin ◽  
Pincer Ligand ◽  
Square Planar ◽  
High Spin Iron

scholarly journals A high-spin square-planar Fe(ii) complex stabilized by a trianionic pincer-type ligand and conclusive evidence for retention of geometry and spin state in solution

2015 ◽  
Vol 6 (1) ◽  
pp. 608-612 ◽  
Author(s):  
M. E. Pascualini ◽  
N. V. Di Russo ◽  
A. E. Thuijs ◽  
A. Ozarowski ◽  
S. A. Stoian ◽  
...  
Keyword(s):  
High Spin ◽  
Spin State ◽  
Conclusive Evidence ◽  
Planar Geometry ◽  
Square Planar

Extensive spectroscopic evaluation of a novel ONO3− trianionic pincer Fe(ii) complex indicates the rare square-planar geometry and S = 2 spin state are retained in solution.

Cobalt(II), nickel(II) and copper(II) complexes of some o-hydroxycrotonophenones

1980 ◽  
Vol 33 (4) ◽  
pp. 729 ◽  
Author(s):  
M Palaniandavar ◽  
C Natarajan
Keyword(s):  
High Spin ◽  
Metal Ion ◽  
Magnetic Measurements ◽  
Thermal Studies ◽  
Ligand Field ◽  
Square Planar ◽  
Infrared Studies ◽  
Stabilization Energies ◽  
Back Bonding ◽  
High Ligand

Metal(II) complexes of the type ML2,nB [M = CuII, NiII, CoII; L = 2- hydroxy-5-X-crotonophenone where X = H, CH3, Cl; B = H2O, pyridine; n = 0, 1, 2] have been obtained and investigated. With the help of element analyses, magnetic measurements, ligand field and infrared spectra and thermal studies, the structure and the nature of bonding have been established. The anhydrous copper(II) chelates are monomeric and possess trans-square-planar configuration while the corresponding cobalt(II) and nickel(II) compounds are polymeric and possess high-spin trans-octahedral configuration. All the base adducts possess high-spin trans-octahedral structure with lesser tendency toward dissociation in solution. Infrared studies indicate that v(C=O) and v(M-O) are affected by metal ion and phenyl substitutions and adduct formation. The order of stabilities, namely Cu > Ni > Co, derived from v(M-O) parallels the crystal field stabilization energies. Substitution in the phenyl ring of the complexes produces shifts in v(M-O) which are related to the resonance capacities of the substituents. ��� The relatively high ligand field strength of o-hydroxycrotonophenone compared to salicylaldehyde is attributed to the conjugation of C=O with C=C which lowers the energy of the π3* orbital leading to extensive back-bonding with dπ orbitals of the metal.

scholarly journals High-Pressure Synthesis of A2 NiO2 Ag2 Se2 (A=Sr, Ba) with a High-Spin Ni2+ in Square-Planar Coordination

2018 ◽  
Vol 58 (3) ◽  
pp. 756-759 ◽  
Author(s):  
Yuki Matsumoto ◽  
Takafumi Yamamoto ◽  
Kousuke Nakano ◽  
Hiroshi Takatsu ◽  
Taito Murakami ◽  
...  
Keyword(s):  
High Pressure ◽  
High Spin ◽  
High Pressure Synthesis ◽  
Square Planar ◽  
Pressure Synthesis

Synthesis and characterization of a family of M2+ complexes supported by a trianionic ONO3− pincer-type ligand: towards the stabilization of high-spin square-planar complexes

2015 ◽  
Vol 44 (46) ◽  
pp. 20207-20215 ◽  
Author(s):  
M. E. Pascualini ◽  
S. A. Stoian ◽  
A. Ozarowski ◽  
N. V. Di Russo ◽  
A. E. Thuijs ◽  
...  
Keyword(s):  
High Spin ◽  
Synthesis And Characterization ◽  
Square Planar ◽  
Square Planar Complexes

A trianionic pincer-type ligand stabilizes rare Fe(ii) and Co(ii) high spin, square-planar complexes.

V4S9Br4:  A Novel High-Spin Vanadium Cluster Thiobromide with Square-Planar Metal Core

2005 ◽  
Vol 109 (50) ◽  
pp. 23804-23807 ◽  
Author(s):  
Yuri V. Mironov ◽  
Spartak S. Yarovoi ◽  
Dmitry Y. Naumov ◽  
Svetlana G. Kozlova ◽  
Vladimir N. Ikorsky ◽  
...  
Keyword(s):  
High Spin ◽  
Metal Core ◽  
Square Planar

First-principles study of the electronic and magnetic properties of the spin-ladder iron oxide Sr3Fe2O5

RSC Advances ◽  
2016 ◽  
Vol 6 (12) ◽  
pp. 10126-10131
Author(s):  
Xianfeng Hao ◽  
Yuanhui Xu ◽  
Shanshan Liu ◽  
Jing Wang ◽  
Faming Gao
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
High Spin ◽  
First Principles ◽  
Spin Ladder ◽  
The Novel ◽  
First Principles Calculations ◽  
Electronic And Magnetic Properties ◽  
First Principles Study ◽  
Square Planar

The electronic and magnetic properties in the novel spin-ladder iron oxide Sr3Fe2O5, containing the unusual square-planar coordination around high-spin Fe2+ cations, are investigated via first principles calculations.

V4S9Br4: A Novel High-Spin Vanadium Cluster Thiobromide with Square-Planar Metal Core.

ChemInform ◽  
2006 ◽  
Vol 37 (12) ◽  
Author(s):  
Yuri V. Mironov ◽  
Spartak S. Yarovoi ◽  
Dmitry Y. Naumov ◽  
Svetlana G. Kozlova ◽  
Vladimir N. Ikorsky ◽  
...  
Keyword(s):  
High Spin ◽  
Metal Core ◽  
Square Planar
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