Hard/Soft Interactions in Early Transition Metal Thioether Macrocyclic Chemistry: Synthesis and Single Crystal Structure of cis-[CrCl2([14]aneS4)]PF6 ([14]aneS4 = 1,4,8,11-tetrathiacyclotetradecane)

1995 ◽  
Vol 34 (1) ◽  
pp. 396-398 ◽  
Author(s):  
Neil R. Champness ◽  
Sarah R. Jacob ◽  
Gillian Reid ◽  
Christopher S. Frampton
Keyword(s):  
Crystal Structure ◽  
Transition Metal ◽  
Single Crystal ◽  
Single Crystal Structure ◽  
Early Transition Metal ◽  
Soft Interactions ◽  
Early Transition

scholarly journals Synthesis and Characterization of Bioactive Acylpyrazolone Sulfanilamides and Their Transition Metal Complexes: Single Crystal Structure of 4-Benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one Sulfanilamide

2015 ◽  
Vol 2015 ◽  
pp. 1-14 ◽  
Author(s):  
Omoruyi G. Idemudia ◽  
Alexander P. Sadimenko ◽  
Anthony J. Afolayan ◽  
Eric C. Hosten
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Single Crystal ◽  
Transition Metal Complexes ◽  
Antimicrobial Agents ◽  
Biological Activities ◽  
Condensation Reaction ◽  
Single Crystal Structure

Two Schiff base ligands Ampp-Sn1and Bmpp-Sn2, afforded by a condensation reaction between sulfanilamide and the respective acylpyrazolone carbonyl precursors, their Mn(II), Co(II), Ni(II), and Cu(II) complexes prepared by the reaction of ligands and corresponding metal salts in aqueous solutions, were synthesized and then characterized by both analytical and spectroscopic methods, in a view to developing new improved bioactive materials with novel properties. On the basis of elemental analysis, spectroscopic and TGA results, transition metal complexes, with octahedral geometry having two molecules of the bidentate keto-imine ligand each, have been proposed. The single crystal structure of Bmpp-Sn according to X-ray crystallography showed a keto-imine tautomer type of Schiff base, having three intramolecular bonds, one short N2⋯H2⋯O3 hydrogen bond of 1.90 Å and two long C13⋯H13⋯O2 and C32⋯H32⋯O3 hydrogen bonds of 2.48 Å. A moderate to low biological activities have been exhibited by synthesized compounds when compared with standard antimicrobial agents on screening the synthesized compounds againstStaphylococcus aureus,Bacillus pumilus,Proteus vulgaris, andAeromonas hydrophilafor antibacterial activity and against free radical 1, 1-diphenyl-2-picryl-hydrazyl (DPPH) for antioxidant activity.

scholarly journals Dithiacrown Ether Substituted Porphyrazines:  Synthesis, Single-Crystal Structure, and Control of Aggregation in Solution by Complexation of Transition-Metal Ions

1996 ◽  
Vol 35 (4) ◽  
pp. 959-969 ◽  
Author(s):  
Cornelus F. van Nostrum ◽  
Franciscus B. G. Benneker ◽  
Hugo Brussaard ◽  
Huub Kooijman ◽  
Nora Veldman ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Transition Metal ◽  
Metal Ions ◽  
Single Crystal ◽  
Transition Metal Ions ◽  
Single Crystal Structure ◽  
And Control

scholarly journals Ti Catalyzed Hydroamination: A Direct Functionalization of Cu Acetylide

2019 ◽  
Author(s):  
Han Hao ◽  
Laurel Schafer
Keyword(s):  
Nmr Spectroscopy ◽  
Transition Metal ◽  
Single Crystal ◽  
Mechanistic Studies ◽  
Single Crystal Diffraction ◽  
X Ray ◽  
Early Transition Metal ◽  
Direct Functionalization ◽  
Metal Catalyzed ◽  
Early Transition

In the presence of a bis-amidate-bis-amido Ti pre-catalyst, an NHC supported Cu acetylide was reacted with <i>p</i>-toluidine to generate a new Cu containing species almost quantitatively. The product was analyzed by NMR spectroscopy and X-ray single crystal diffraction to be a Cu enamide. Preliminary mechanistic studies suggest the reaction follows well accepted [2+2] cycloaddition mechanism for early transition metal catalyzed hydroamination. Furthermore, the reaction is likely to be a direct functionalization of the alkyne moiety of the Cu acetylide.

scholarly journals Ti Catalyzed Hydroamination: A Direct Functionalization of Cu Acetylide

2019 ◽  
Author(s):  
Han Hao ◽  
Laurel Schafer
Keyword(s):  
Nmr Spectroscopy ◽  
Transition Metal ◽  
Single Crystal ◽  
Mechanistic Studies ◽  
Single Crystal Diffraction ◽  
X Ray ◽  
Early Transition Metal ◽  
Direct Functionalization ◽  
Metal Catalyzed ◽  
Early Transition

In the presence of a bis-amidate-bis-amido Ti pre-catalyst, an NHC supported Cu acetylide was reacted with <i>p</i>-toluidine to generate a new Cu containing species almost quantitatively. The product was analyzed by NMR spectroscopy and X-ray single crystal diffraction to be a Cu enamide. Preliminary mechanistic studies suggest the reaction follows well accepted [2+2] cycloaddition mechanism for early transition metal catalyzed hydroamination. Furthermore, the reaction is likely to be a direct functionalization of the alkyne moiety of the Cu acetylide.

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