scholarly journals NMR probe effects on trans-philicity and trans-influence ladders in square planar Pt(ii) complexes

2020 ◽  
Vol 44 (19) ◽  
pp. 7976-7986 ◽  
Author(s):  
Athanassios C. Tsipis
Keyword(s):  
Structural Parameters ◽  
Trans Influence ◽  
Square Planar

trans-Philicity ladders for trans-Pt(PMe3)2(X)L (X = H, CH3, CO, NH2, OH2, Cl) complexes are built by σiso X NMR descriptors. Correlations of the σiso X vs popular electronic/structural parameters of L and X demonstrate the origin of trans philicity.

scholarly journals Variable combinations of organophosphines in PtP3X derivatives: Structural aspects

2020 ◽  
Vol 44 (1) ◽  
pp. 12-21
Author(s):  
Milan Melník ◽  
Peter Mikuš
Keyword(s):  
Structural Parameters ◽  
Covalent Radius ◽  
Planar Geometry ◽  
Trans Influence ◽  
Square Planar ◽  
Structural Aspects

Abstract This review covers over fifty Pt (II) complexes of the compositions PtP3X (X = H, OL, NL, BL, Cl, SL, Br, or I). These complexes crystallized in three crystal classes: monoclinic (23 examples) triclinic (17 examples) and orthorhombic (11 examples). The PtP3Cl is most common with 23 examples. There are variable combinations of organophosphines monodentate – P; bidentate- P,P; P,N; P,B; and tridentate – P,P,P; P,O,P; P,N,P; and P,S,P. The structural parameters (Pt–L, L–Pt–L) are analyzed and discussed with an attention to the distortion of a square-planar geometry about the Pt (II) atoms as well as of trans-influence. The sums of Pt–L (x4) bond distances growing with covalent radius of the X-atoms.

The trans influence of F, Cl, Br and I ligands in a series of square-planar Pd(II) complexes. Relative affinities of halide anions for the metal centre in trans-[(Ph3P)2Pd(Ph)X]

1998 ◽  
Vol 280 (1-2) ◽  
pp. 87-98 ◽  
Author(s):  
Jeffrey P. Flemming ◽  
Mark C. Pilon ◽  
Oleg Ya. Borbulevitch ◽  
Mikhail Yu. Antipin ◽  
Vladimir V. Grushin
Keyword(s):  
Metal Centre ◽  
Trans Influence ◽  
Halide Anions ◽  
Square Planar ◽  
In Trans

scholarly journals New Platinum(II) Complex Containing Asymmetric Tetra Dentate Schiff Base Ligand Synthesis, Characterization and DFT Calculation

2012 ◽  
Vol 9 (4) ◽  
pp. 2114-2118 ◽  
Author(s):  
Alireza Akbari ◽  
Iran Sheikhshoaie ◽  
Lotfali Saghatforoush ◽  
S. Yousof Ebrahimipour ◽  
Zohreh Amiri
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Dft Calculation ◽  
Structural Parameters ◽  
Platinum Complex ◽  
Molar Conductivity ◽  
Cationic Complex ◽  
Square Planar ◽  
Optimized Geometries ◽  
Good Agreement

The tetra dentate neutral (E)-4-nitro-2-((2-(2-(pyridin-2-yl) ethylthio) ethylimino) methyl) phenol, (pytaO2NSalH), Schiff-base ligand was synthesized using 1-(2-pyridyl)-3-thia-s-aminopentane (pyta) and 5-NO2salicylaldehyde. Then the related square planar Pt (II) cationic complex, [Pt (NSNO)] Cl, was synthesized using PtCl2(SMe2)2as precursor complex. The nature of the pytaO2NSalH and its platinum complex were determined by the elemental analysis, molar conductivity and spectrochemical (IR, UV–vis,1HNMR) techniques. In addition, the fully optimized geometries and vibration frequencies of them together were calculated using the ADF 2009.01 package. Structural parameters are in good agreement with the experimental data. The calculated and experimental results confirmed the suggested structures for the ligand and complex.

A Relativistic Quantum-Chemical Analysis of the trans Influence on 1H NMR Hydride Shifts in Square-Planar Platinum(II) Complexes

2015 ◽  
Vol 54 (15) ◽  
pp. 7199-7208 ◽  
Author(s):  
Anja H. Greif ◽  
Peter Hrobárik ◽  
Veronika Hrobáriková ◽  
Alexei V. Arbuznikov ◽  
Jochen Autschbach ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
1H Nmr ◽  
Quantum Chemical ◽  
Relativistic Quantum ◽  
Quantum Chemical Analysis ◽  
Trans Influence ◽  
Square Planar

Rhodium(I) complexes containing bidentate pyrazolylgallate ligands. X-ray crystal structures of [Me2Gapz2]Rh(COD), [Rh(μ-3,5-Me2pz)(CO)2]2, and [Rh(μ-3,5-Me2pz)(COD)]2

1984 ◽  
Vol 62 (6) ◽  
pp. 1057-1067 ◽  
Author(s):  
Brenda M. Louie ◽  
Steven J. Rettig ◽  
Alan Storr ◽  
James Trotter
Keyword(s):  
Solid State ◽  
Structural Parameters ◽  
Heavy Atom ◽  
Boat Conformation ◽  
Nmr Studies ◽  
Space Group ◽  
H Nmr ◽  
Square Planar ◽  
Dirhodium Complexes

The synthesis and characterization of the complexes [Me2Gapz2]Rh(LL) (where LL = COD, (CO)2, (PPh3)2, or (PPh3)(CO)), incorporating the bidentate, chelating, dimethylbis(1-pyrazolyl)gallate ligand are described. Non-rigidity in solution has been demonstrated by 1H nmr studies for some of the complexes. A crystal structure determination of the COD complex has confirmed the boat conformation for the Ga—(N—N)2—Rh six-membered ring in this complex in the solid state. In addition, the solid state structures of the 3,5-dimethylpyrazolyl bridged dirhodium complexes [Rh(μ-3,5-Me2pz)(CO)2]2 and [Rh(μ-3,5-Me2pz)(COD)]2 have been determined. Crystals of [Me2Gapz2]Rh(COD) are orthorhombic, a = 22.7447(8), b = 11.9776(5), c = 6.4635(3) Å, Z = 4, space group Pnma; those of [Rh(μ-3,5-Me2pz)(CO)2]2 are monoclinic, a = 8.7403(6), b = 16.3594(6), c = 25.434(2) Å, β = 95.286(3)°, Z = 8, space group P21/c; and those of [Rh(μ-3,5-Me2pz)(COD)]2 are triclinic, a = 10.350(2), b = 11.401(2), c = 12.355(2) Å, α = 112.485(7), β = 99.394(9), γ = 105.387(8)°, Z = 2, space group [Formula: see text]. All three structures were solved by conventional heavy atom techniques and were refined by full-matrix least-squares procedures to final conventional R values of 0.026, 0.024, and 0.037 for 1824, 5135, and 6109 reflections with I ≥ 3σ(I), respectively. In each case the Rh atoms have distorted square planar coordination geometry. Important mean structural parameters are Rh—N = 2.087(2), Rh—C = 2.129(2), [Formula: see text] for [Me2Gapz2]Rh(COD); Rh—N = 2.063(6), Rh—CO = 1.852(9), [Formula: see text] for [Rh(μ-3,5-Me2pz)(CO)2]2; and Rh—N = 2.084(1), Rh—C = 2.131(7), [Formula: see text] for [Rh(μ-3,5-Me2pz)(COD)]2.

scholarly journals Structures of Pt(0)P3, Pt(0)P4 and Pt(II)P4 – Distortion isomers

2020 ◽  
Vol 43 (1) ◽  
pp. 111-116
Author(s):  
Milan Melník ◽  
Peter Mikuš
Keyword(s):  
Structural Parameters ◽  
Donor Ligands ◽  
Planar Geometry ◽  
Bidentate Ligands ◽  
Tetrahedral Geometry ◽  
Cooperative Effects ◽  
Square Planar ◽  
Crystal Class ◽  
Planar Geometries

AbstractIn this review are analyzed and classified crystallographic and structural parameters of P(0)P3, Pt(0) P4 and Pt(II)P4 derivatives – distortion isomers. Some of the isomers are differing not only by degree of distortion but also by crystal class. There are three types of organo-phosphines which build up the respective geometry about the platinum atoms. In Pt(0)P3 a distorted trigonal planar geometry is build up by three monodentate PPh3 ligands. In Pt(0)P4 a tetrahedral geometry with various degree of distortion is build up by a pair of homo-bidentate ligands. In Pt(II)P4 isomers a square-planar geometries with various degree of distortion are build up by bidentate-P,P’donor ligands, (except one example of isomers, where a tetradentate is involved). The bidentate-P,P’-donor ligands form: four-(PNP,PCP), five-(PC2P) and six-(PC3P) metallocyclic rings. The tetradentate forms five-(PC2P). There are some cooperative effects between Pt–P bond distances and the metallocyclic rings, and at the same time a distortion of the respective geometry increases.

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