Three-Fold Intramolecular Ring Closing Alkene Metatheses of Square Planar Complexes with cis Phosphorus Donor Ligands P(X(CH2)mCH═CH2)3 (X = −, m = 5–10; X = O, m = 3–5): Syntheses, Structures, and Thermal Properties of Macrocyclic Dibridgehead Diphosphorus Complexes

2018 ◽  
Vol 140 (27) ◽  
pp. 8463-8478 ◽  
Author(s):  
Hemant Joshi ◽  
Sugam Kharel ◽  
Andreas Ehnbom ◽  
Katrin Skopek ◽  
Gisela D. Hess ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Donor Ligands ◽  
Square Planar ◽  
Square Planar Complexes ◽  
Intramolecular Ring

scholarly journals Pyridine versus acetonitrile coordination in rhodium–N-heterocyclic carbene square-planar complexes

2015 ◽  
Vol 44 (12) ◽  
pp. 5777-5789 ◽  
Author(s):  
Laura Palacios ◽  
Andrea Di Giuseppe ◽  
Ricardo Castarlenas ◽  
Fernando J. Lahoz ◽  
Jesús J. Pérez-Torrente ◽  
...  
Keyword(s):  
Coordination Chemistry ◽  
Donor Ligands ◽  
Theoretical Studies ◽  
Square Planar ◽  
Square Planar Complexes ◽  
Experimental And Theoretical Studies

Experimental and theoretical studies on the factors that control the coordination chemistry of N-donor ligands in square-planar complexes of the type RhCl(NHC)L1L2 (NHC = N-heterocyclic carbene) are presented.

Three-Fold Intramolecular Ring-Closing Metatheses Involving Square-Planar Platinum Complexes withcis-Phosphorus Donor Ligands: Syntheses, Structures, and Properties of Parachute-like Complexes

2008 ◽  
Vol 47 (9) ◽  
pp. 3474-3476 ◽  
Author(s):  
Katrin Skopek ◽  
Michał Barbasiewicz ◽  
Frank Hampel ◽  
John A. Gladysz
Keyword(s):  
Platinum Complexes ◽  
Donor Ligands ◽  
Square Planar ◽  
Structures And Properties ◽  
Intramolecular Ring

NiII formate complexes with bi- and tridentate nitrogen-donor ligands: synthesis, characterization, and magnetic and thermal properties

2017 ◽  
Vol 46 (12) ◽  
pp. 3963-3979 ◽  
Author(s):  
Karoline Rühlig ◽  
Akerke Abylaikhan ◽  
Azar Aliabadi ◽  
Vladislav Kataev ◽  
Simon Liebing ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Metallic Nickel ◽  
Donor Ligands ◽  
Nitrogen Donor Ligands ◽  
Nitrogen Donor

New NiII formate complexes were synthesized and characterized to exhibit low decomposition temperatures to produce pure metallic nickel.

Chlorine nuclear quadrupole resonance in some chloro complexes of divalent copper

1971 ◽  
Vol 24 (10) ◽  
pp. 1993 ◽  
Author(s):  
DE Scaife
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
Covalent Bonding ◽  
Divalent Copper ◽  
Chloro Complexes ◽  
35Cl Nucleus ◽  
Square Planar ◽  
Bonding Interaction ◽  
Quadrupole Resonance ◽  
Square Planar Complexes ◽  
Nuclear Quadrupole

Nuclear quadrupole resonance for the 35Cl nucleus has been observed in some chloro complexes of divalent copper. Square-planar complexes each show two resonance lines, with the following frequencies (at 77�K): (CH3NH3)2CuCl4, 10.780, 12.157 MHz; (C2H5NH3)2CuCl4, 10.817, 12.074 MHz; (enH2)CuCl4, 10.271, 11.901 MHz; and (C3H7NH3)2CuCl4 at 223�K, 11.290 and 11.781 MHz. NH4CuCl3, containing dimeric Cu2Cl62- units, has resonances, at 77�K, at 11.907, 11.993, and 12.448 MHz. The trigonal pyramidal anion in Co(NH3)6CuCl5 has two resonances at 9.642 and 10.352 MHz at 77�K. ��� These results are compared with previous results for copper chloro complexes, and the implications of covalent bonding are discussed. In particular, it is suggested that the long-bond interaction between units in square-planar complexes amounts to 7-16% of the bonding interaction within the units.

Extended X-ray absorption fine structure and multiple-scattering simulation of nickel dithiolene complexes Ni[S2C2(CF3)2]2n(n= −2, −1, 0) and an olefin adduct Ni[S2C2(CF3)2]2(1-hexene)

2015 ◽  
Vol 22 (1) ◽  
pp. 124-129 ◽  
Author(s):  
Weiwei Gu ◽  
Hongxin Wang ◽  
Kun Wang
Keyword(s):  
Fine Structure ◽  
Multiple Scattering ◽  
Edge Structure ◽  
X Ray ◽  
Absorption Fine ◽  
Square Planar ◽  
Square Planar Complexes ◽  
Uv Visible ◽  
Edge Features ◽  
X Ray Absorption

A series of Ni dithiolene complexes Ni[S2C2(CF3)]2n(n= −2, −1, 0) (1,2,3) and a 1-hexene adduct Ni[S2C2(CF3)2]2(C6H12) (4) have been examined by NiK-edge X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine-structure (EXAFS) spectroscopies. Ni XANES for1–3reveals clear pre-edge features and approximately +0.7 eV shift in the NiK-edge position for `one-electron' oxidation. EXAFS simulation shows that the Ni—S bond distances for1,2and3(2.11–2.16 Å) are within the typical values for square planar complexes and decrease by ∼0.022 Å for each `one-electron' oxidation. The changes in NiK-edge energy positions and Ni—S distances are consistent with the `non-innocent' character of the dithiolene ligand. The Ni—C interactions at ∼3.0 Å are analyzed and the multiple-scattering parameters are also determined, leading to a better simulation for the overall EXAFS spectra. The 1-hexene adduct4presents no pre-edge feature, and its NiK-edge position shifts by −0.8 eV in comparison with its starting dithiolene complex3. Consistently, EXAFS also showed that the Ni—S distances in4elongate by ∼0.046 Å in comparison with3. The evidence confirms that the neutral complex is `reduced' upon addition of olefin, presumably by olefin donating the π-electron density to the LUMO of3as suggested by UV/visible spectroscopy in the literature.

Reactions in Square Planar Complexes

2016 ◽  
pp. 161-172
Author(s):  
Vasishta Bhatt
Keyword(s):  
Square Planar ◽  
Square Planar Complexes

scholarly journals Nickel(II) cyclohexylethyl-dithiocarbamate P-donor ligands in the coordination sphere

2004 ◽  
Vol 69 (12) ◽  
pp. 1053-1061 ◽  
Author(s):  
Josef Husárek ◽  
Richard Pstorek ◽  
Michal Malon ◽  
Zedenek Sindalar ◽  
Marek Pavlícek
Keyword(s):  
Thermal Analysis ◽  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
1H Nmr Spectroscopy ◽  
Chemical Study ◽  
Donor Ligands ◽  
Conductivity Measurements ◽  
Physico Chemical ◽  
Square Planar ◽  
Vis Spectroscopy

A series of new Ni(II) dithiocarbamate compounds of the composition [NiX(cetdtc)(PR3)](X = Cl, Br, I, NCS; cetdtc = cyclohexylethyldithiocarbamate; R = phenyl, n-butyl) has been synthesized. All the isolated complexes have been characterized by elemental analysis, IR and UV/VIS spectroscopy, 31P{1H}-NMR spectroscopy, thermal analysis magnetochemical and conductivity measurements. On the basis of the results of the physico-chemical study, all complexes are diamagnetic, non-electrolytes with a square-planar NiS2PX chromophore.

scholarly journals Stacking interactions between phenanthroline ligands in square-planar complexes

2011 ◽  
Vol 67 (a1) ◽  
pp. C321-C321
Author(s):  
D. B. Ninković ◽  
G. V. Janjić ◽  
P. V. Petrović ◽  
S. D. Zarić
Keyword(s):  
Stacking Interactions ◽  
Square Planar ◽  
Square Planar Complexes ◽  
Phenanthroline Ligands
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