scholarly journals Intramolecular N-coordination in ketiminoboranes

2015 ◽  
Vol 44 (12) ◽  
pp. 5284-5287 ◽  
Author(s):  
Catherine E. Bacon ◽  
Liz Mansour ◽  
John J. Hayward ◽  
Jeremy M. Rawson
Keyword(s):  
Donor Capability

Ketiminoboranes, R2CNB-R′2, pioneered by Wade et al., are formally isoelectronic with allenes but undergo intramolecular cyclisation when R = 2-pyridyl to form heterocyclic boranes with N-donor capability.

Bulky N-heterocyclic carbene and pyridine donor adducts of Co(II) bromide: Influence on reactivity of stoichiometry, sterics and donor capability

2013 ◽  
Vol 741-742 ◽  
pp. 33-39 ◽  
Author(s):  
Katharine A. Smart ◽  
Antonia Vanbergen ◽  
Jan Lednik ◽  
Christina Y. Tang ◽  
Hassanatu B. Mansaray ◽  
...  
Keyword(s):  
Donor Capability

Design of nickel donor–acceptor dithiolenes for 2nd order nonlinear optics: an experimental and computational study

2019 ◽  
Vol 43 (32) ◽  
pp. 12570-12579 ◽  
Author(s):  
Salahuddin S. Attar ◽  
Luciano Marchiò ◽  
Luca Pilia ◽  
Maria F. Casula ◽  
Davide Espa ◽  
...  
Keyword(s):  
Nonlinear Optics ◽  
Energy Absorption ◽  
Computational Study ◽  
Low Energy ◽  
Nlo Properties ◽  
Donor Acceptor ◽  
The Relationship ◽  
Donor Capability

This study, concerning the influence on the NLO properties of a remote functionality in the donor of D–Ni–A dithiolenes 1–4, allows to point out the relationship between NLO properties and the donor capability in modulating the low-energy absorption.

scholarly journals Chiral Thioureas—Preparation and Significance in Asymmetric Synthesis and Medicinal Chemistry

Molecules ◽  
2020 ◽  
Vol 25 (2) ◽  
pp. 401 ◽  
Author(s):  
Franz Steppeler ◽  
Dominika Iwan ◽  
Elżbieta Wojaczyńska ◽  
Jacek Wojaczyński
Keyword(s):  
Hydrogen Bond ◽  
Drug Development ◽  
Asymmetric Synthesis ◽  
Stereoselective Synthesis ◽  
Strong Hydrogen Bond ◽  
Hydrogen Bond Donor ◽  
Drug Candidates ◽  
Current State ◽  
The Family ◽  
Donor Capability

For almost 20 years, thioureas have been experiencing a renaissance of interest with the emerged development of asymmetric organocatalysts. Due to their relatively high acidity and strong hydrogen bond donor capability, they differ significantly from ureas and offer, appropriately modified, great potential as organocatalysts, chelators, drug candidates, etc. The review focuses on the family of chiral thioureas, presenting an overview of the current state of knowledge on their synthesis and selected applications in stereoselective synthesis and drug development.

Darstellung und spektroskopische Charakterisierung von Natriumpentacyano(phosphan/phosphit)ferraten(III) / Preparation and Spectroscopic Characterization of Sodium Pentacyano(phosphane/phosphite)ferrates(III)

2001 ◽  
Vol 56 (1) ◽  
pp. 9-12
Author(s):  
Hidenari Inoue ◽  
Satomi Osone ◽  
Ekkehard Fluck
Keyword(s):  
Linear Correlation ◽  
Electronic Spectroscopy ◽  
Spectroscopic Characterization ◽  
Phosphorus Ligands ◽  
Spectroscopic Parameters ◽  
Back Bonding ◽  
Donor Capability

Abstract Sodium pentacyanoferrates(III) of the type Na2[Fe(CN)5L] (L = phosphane or phosphite) have been prepared from sodium pentacyanoferrates(II), Na3[Fe(CN)5L], by bromine oxidation and characterized by Mössbauer, IR, and electronic spectroscopy. Isomer shifts and quadrupole splittings lie within the range commonly found in low-spin iron(III) complexes. A linear correlation was found between isomer shifts and CN stretching and Fe-CN bending frequencies, respectively. The spectroscopic parameters show that the dπ-dπ back bonding of the Fe-P bonds is synergetically strengthened with increasing σ donor capability of the phosphorus ligands.

Infrared, 57Fe Mössbauer, and 31P NMR Spectroscopic Characterization of Fe(CO)4L (L = Phosphine and Phosphite)

1987 ◽  
Vol 42 (5) ◽  
pp. 573-578 ◽  
Author(s):  
Hidenari Inoue ◽  
Takashi Nakagome ◽  
Takeshi Kuroiwa ◽  
Tsuneo Shirai ◽  
Ekkehard Fluck
Keyword(s):  
31P Nmr ◽  
Chemical Shifts ◽  
Spectroscopic Characterization ◽  
Negative Slope ◽  
Positive Slope ◽  
Carbonyl Ligands ◽  
Trigonal Bipyramidal ◽  
Back Donation ◽  
Donor Capability

A series of trigonal bipyramidal Fe(CO)4L complexes has been prepared and characterized by infrared, 57Fe Mössbauer and 31P NMR spectroscopy. A linear correlation, with a negative slope, between the CO stretching frequencies and the isomer shifts demonstrates that the triple bond nature of the carbonyl ligands is strengthened with increasing iron-to-phosphorus back donation. The linear dependence of the quadrupole splittings on the isomer shifts with a positive slope has revealed that the σ-donor capability of the phosphine or phosphite ligand is offset by the π-acceptor capability. The formation of Fe(CO)4L complexes from the corresponding free ligands is accompanied by a downfield shift of 31P NMR chemical shifts. The coordination shifts are linearly correlated with the Mössbauer isomer shifts.

scholarly journals Palladium complexes with simple iminopyridines as catalysts for polyketone synthesis

2016 ◽  
Vol 45 (37) ◽  
pp. 14609-14619 ◽  
Author(s):  
V. Rosar ◽  
D. Dedeic ◽  
T. Nobile ◽  
F. Fini ◽  
G. Balducci ◽  
...  
Keyword(s):  
Systematic Study ◽  
Chemical Shifts ◽  
Palladium Complexes ◽  
Nmr Chemical Shifts ◽  
The Relationship ◽  
Donor Capability ◽  
Catalytic Performances

A systematic study on iminopyridine palladium complexes demonstrates the relationship among NMR chemical shifts, ligand donor capability and catalytic performances.

Relative donor capability of sulfur and oxygen atoms

1977 ◽  
Vol 20 (6) ◽  
pp. 725-729
Author(s):  
V. I. Khaustova
Keyword(s):  
Donor Capability ◽  
Oxygen Atoms

Cyclometallation on platinum(ii) complexes; the role of the solvent and added base donor capability on the reaction mechanisms

2003 ◽  
pp. 3763-3769 ◽  
Author(s):  
Margarita Crespo ◽  
Mercè Font-Bardia ◽  
Jaume Granell ◽  
Manuel Martínez ◽  
Xavier Solans
Keyword(s):  
Reaction Mechanisms ◽  
Donor Capability
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