2,2′:6′,2′′-Terpyridine switches from tridentate to monodentate coordination in a gold(iii) terpy complex upon reaction with sodium azide

2019 ◽  
Vol 55 (56) ◽  
pp. 8142-8145 ◽  
Author(s):  
Kun Peng ◽  
Alexandra Friedrich ◽  
Ulrich Schatzschneider
Keyword(s):  
Sodium Azide ◽  
Coordination Mode ◽  
X Ray ◽  
Monodentate Coordination

The X-ray structure of a gold(iii) azido complex with a terpyridine coligand in a very rare monodentate coordination mode is reported.

A novel coordination mode for dithiatetrazocines: preparation, x-ray structure, and fluxional behavior of [Pt(PPh3)(1,5-Ph4P2N4S2)]2

1990 ◽  
Vol 29 (17) ◽  
pp. 3068-3069 ◽  
Author(s):  
Tristram Chivers ◽  
Mark Edwards ◽  
Pramesh N. Kapoor ◽  
Auke Meetsma ◽  
Johan C. Van de Grampel ◽  
...  
Keyword(s):  
Coordination Mode ◽  
X Ray

[Zn(phen)2(CX3COO)]+, X = H orCl; Influence of X on the Coordination Mode of the Carboxylate Group (phen = 1,10-Phenanthroline)

2005 ◽  
Vol 60 (10) ◽  
pp. 1049-1053 ◽  
Author(s):  
Zeanab Talaei ◽  
Ali Morsali ◽  
Ali R. Mahjoub
Keyword(s):  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Coordination Mode ◽  
Bidentate Ligand ◽  
Carboxylate Group ◽  
X Ray ◽  
X Ray Crystallography ◽  
H Nmr ◽  
Coordinate Geometry ◽  
C Nmr

Two new ZnII(phen)2 complexes with trichloroacetate and acetate anions, [Zn(phen)2(CCl3COO)- (H2O)](ClO4) and [Zn(phen)2(CH3COO)](ClO4), have been synthesized and characterized by elemental analysis, IR, 1H NMR, 13C NMR spectroscopy. The single crystal X-ray data of these compounds show the Zn atoms to have six-coordinate geometry. From IR spectra and X-ray crystallography it is established that the coordination of the COO− group is different for trichloroacetate and acetate. The former acts as a monodentate whereas the latter acts as a bidentate ligand.

Investigation of the effect of sodium azide on the coordination mode of flexible ONO-donor hydrazone ligand in preparing manganese coordination compounds

Polyhedron ◽  
2020 ◽  
Vol 190 ◽  
pp. 114751
Author(s):  
Rahman Bikas ◽  
Monireh Darvishvand ◽  
Victor Kuncser ◽  
Gabriel Schinteie ◽  
Milosz Siczek ◽  
...  
Keyword(s):  
Sodium Azide ◽  
Coordination Compounds ◽  
Coordination Mode ◽  
Hydrazone Ligand

Synthesis, X-ray characterization and DFT study of a novel Fe(III)–pyridine-2,6-dicarboxylic acid N-oxide complex with unusual coordination mode

2016 ◽  
Vol 449 ◽  
pp. 44-51 ◽  
Author(s):  
Maryam Bazargan ◽  
Masoud Mirzaei ◽  
Hossein Eshtiagh-Hosseini ◽  
Joel T. Mague ◽  
Antonio Bauzá ◽  
...  
Keyword(s):  
Dicarboxylic Acid ◽  
Coordination Mode ◽  
Dft Study ◽  
X Ray

scholarly journals Transition metal complexes with pyrazole-based ligands, Part 29: Reactions of zinc(II) and mercury(II) thiocyanate with 4-acetyl-3-amino-5-methylpyrazole

2009 ◽  
Vol 74 (11) ◽  
pp. 1259-1271 ◽  
Author(s):  
Zeljko Jacimovic ◽  
Goran Bogdanovic ◽  
Berta Holló ◽  
Vukadin Leovac ◽  
Katalin Szécsényi-Mészáros
Keyword(s):  
Transition Metal Complexes ◽  
Zinc Complex ◽  
Ammonium Thiocyanate ◽  
Molecular Structures ◽  
Coordination Geometry ◽  
Ethanolic Solution ◽  
Tetrahedral Geometry ◽  
X Ray ◽  
Planar Form ◽  
Monodentate Coordination

The work is concerned with the crystal and molecular structures of zinc(II) and mercury(II) complexes with 4-acetyl-3-amino-5-methyl-pyrazole (aamp) of the coordination formulae [Zn(NCS)2(aamp)2[ and (Haamp)2[Hg(SCN)4]. The zinc(II) complex was obtained by the reaction of a warm methanolic solution of aamp with a mixture of zinc(II) nitrate and ammonium thiocyanate, whereas the mercury(II) complex was prepared by the reaction of a warm ethanolic solution of aamp and a warm, slightly acidified aqueous solution of [Hg(SCN)4]2-. Both complexes have a tetrahedral geometry, which in the case of zinc complex is formed by monodentate coordination of two aamp molecules and two isothiocyanate groups. The Zn(II) and Hg(II) atoms have significantly deformed coordination geometry. In both crystal structures the pyrazole derivative has a planar form, probably stabilized by an intramolecular N-H???O hydrogen bond. Apart from the X-ray structural analysis, the isolated complexes were characterized by elemental analysis, IR spectroscopy, conductometric measurements and thermal analysis.

Heterocyclic Synthesis With Azides. II. The Reaction of Azide With Ethoxymethylenemalonate

1992 ◽  
Vol 45 (11) ◽  
pp. 1781 ◽  
Author(s):  
A Donkor ◽  
RH Prager ◽  
MR Taylor ◽  
MJ Thompson
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Sodium Azide ◽  
Crystal Structure Analysis ◽  
Heterocyclic Synthesis ◽  
X Ray ◽  
Diethyl Ethoxymethylenemalonate

Sodium azide reacts with diethyl ethoxymethylenemalonate in dimethylsulfoxide to give diethyl 2,4-diethoxycarbonylpent-2-enedioate (12%) and diethyl 5-hydroxypyrrole-2,4-dicarboxyiate (60%). The structure of the latter was determined by X-ray crystal structure analysis at 150 K, and both compounds have been independently synthesized.

scholarly journals Steric and Electronic Effect of Cp-Substituents on the Structure of the Ruthenocene Based Pincer Palladium Borohydrides

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2236
Author(s):  
Sergey V. Safronov ◽  
Elena S. Osipova ◽  
Yulia V. Nelyubina ◽  
Oleg A. Filippov ◽  
Irina G. Barakovskaya ◽  
...  
Keyword(s):  
Coordination Compounds ◽  
Coordination Mode ◽  
Electronic Effect ◽  
Palladium Chloride ◽  
Pincer Ligands ◽  
Palladium Atom ◽  
Volume Increase ◽  
X Ray ◽  
Ruthenium Atom ◽  
Direction Opposite

Ruthenocene-based PCPtBu pincer ligands were used to synthesize novel pincer palladium chloride RcF[PCPtBu]PdCl (2a) and two novel palladium tetrahydroborates RcF[PCPtBu]Pd(BH4) (3a) and Rc*[PCPtBu]Pd(BH4) (3b), where RcF[PCPtBu] = κ3-{2,5-(tBu2PCH2)2-C5H2}Ru(CpF) (CpF = C5Me4CF3), and Rc*[PCPtBu] = κ3-{2,5-(tBu2PCH2)2C5H2}Ru(Cp*) (Cp* = C5Me5). These coordination compounds were characterized by X-ray, NMR and FTIR techniques. Analysis of the X-ray data shows that an increase of the steric bulk of non-metalated cyclopentadienyl ring in 3a and 3b relative to non-substituted Rc[PCPtBu]Pd(BH4) analogue (3c; where Rc[PCPtBu] = κ3-{2,5-(tBu2PCH2)2C5H2}Ru(Cp), Cp = C5H5) pushes palladium atom from the middle plane of the metalated Cp ring in the direction opposite to the ruthenium atom. This displacement increases in the order 3c < 3b < 3a following the order of the Cp-ring steric volume increase. The analysis of both X-ray and IR data suggests that BH4 ligand in both palladium tetrahydroborates 3a and 3b has the mixed coordination mode η1,2. The strength of the BH4 bond with palladium atom increases in the order Rc[PCPtBu]Pd(BH4) < Rc*[PCPtBu]Pd(BH4) < RcF[PCPtBu]Pd(BH4) that appears to be affected by both steric and electronic properties of the ruthenocene moiety.

Synthesis and reactions of 2-azido-1,3-di(benzyloxy)imidazolium hexafluoridophosphate

2016 ◽  
Vol 71 (9) ◽  
pp. 997-1003 ◽  
Author(s):  
Gerhard Laus ◽  
Mirco E. Kostner ◽  
Volker Kahlenberg ◽  
Herwig Schottenberger
Keyword(s):  
Crystal Structures ◽  
Sodium Azide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bromo Compound

Abstract2-Azido-1,3-di(benzyloxy)imidazolium hexafluoridophosphate was obtained from the corresponding 2-bromo compound by reaction with sodium azide. Cycloaddition of the 2-azido compound with norbornene and norbornadiene gave the respective tricyclic aziridine and bicyclic azaoctadiene. Addition of triphenylphosphane yielded the phosphazide which upon heating eliminated dinitrogen to afford the phosphazene. The crystal structures of five compounds were determined by X-ray diffraction.

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