Fully Fluorinated Alkoxides. Part VI. Derivatives of Hydroxyhexafluoroisobutyric Acid

1972 ◽  
Vol 50 (6) ◽  
pp. 939-945 ◽  
Author(s):  
J. T. Price ◽  
A. J. Tomlinson ◽  
C. J. Willis
Keyword(s):  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Tridentate Ligand ◽  
Phosphorus Containing ◽  
Fluorinated Alkoxides ◽  
Derivatives Of ◽  
Spectrochemical Series

Hydroxyhexafluoroisobutyric acid, HOC(CF3)2COOH, H2(HHIB), gives complexes with a variety of metals, acting as a chelating, dinegative ligand. Derivatives prepared include [B(HHIB)2]−, [M(HHIB)2]2− (M = Ni, Cu, Co), [M(HHIB)3]3− (M = Al, Cr, Mn, Fe), and mixed ligand complexes of Cu and Ni with HHIB and nitrogen- or phosphorus-containing ligands. In some cases, the HHIB anion appears to act as a tridentate ligand through carboxylate bridging. HHIB is close to water in the spectrochemical series.

Fluorinated Alkoxides. Part VIII. Mixed Ligand Complexes of Perfluoropinacol with Ni2+, Pd2+, Pt2+ and Cu2+. Solvation Equilibria between 4- and 5-coordinate Ni2+

1975 ◽  
Vol 53 (6) ◽  
pp. 809-816 ◽  
Author(s):  
W. Stafford Cripps ◽  
Christopher J. Willis
Keyword(s):  
Metal Ion ◽  
Nickel Complexes ◽  
Mixed Ligand ◽  
Ligand Field ◽  
Electronic Effects ◽  
Unusual Behavior ◽  
Planar Structures ◽  
Square Planar ◽  
Phosphorus Containing ◽  
Fluorinated Alkoxides

Perfluoropinacol, (CF3)2C(OH)C(OH)(CF3)2, ionizes by loss of two protons, and the resulting dinegative ion (PFP2−) chelates to Ni2+, Pd2+, Pt2+, and Cu2+. A variety of stable neutral complexes may be isolated if the tetracoordination of the metal ion is completed with two monodentate or one bidentate nitrogen- or phosphorus-containing ligands; square-planar structures are invariably found. The structures of these complexes are contrasted with those of analogous halides, and it is concluded that electronic effects are predominant in determining them, although steric influences may sometimes be important. The ligand field strength of the perfluoropinacolato ion is approximately equal to that of the thiocyanate ion.The nickel complexes Ni(PFP)22− and (PFP)Ni(RNHCH2CH2NHR) react with donor solvents (water, methanol, pyridine, etc.) to give equilibria between four- and five-coordinate solvated species; six-coordinate species are not observed. This unusual behavior is attributed to the steric hindrance imposed by the bulk of the PFP2− ligand.

scholarly journals Silver derivatives of multi-donor heterocyclic thioamides as antimicrobial/anticancer agents: unusual bio-activity against methicillin resistantS. aureus,S. epidermidis, andE. faecalisand human bone cancerMG63cell line

RSC Advances ◽  
2019 ◽  
Vol 9 (27) ◽  
pp. 15470-15487 ◽  
Author(s):  
Jaspreet K. Aulakh ◽  
Tarlok S. Lobana ◽  
Henna Sood ◽  
Daljit S. Arora ◽  
Raminderjit Kaur ◽  
...  
Keyword(s):  
Anticancer Activity ◽  
Anticancer Agents ◽  
Mixed Ligand ◽  
Human Bone ◽  
Mixed Ligand Complexes ◽  
Line P ◽  
Derivatives Of ◽  
Heterocyclic Thioamides

A series of biosafe mixed-ligand complexes of silver with heterocyclic thioamides have been studied for their antimicrobial/anticancer activity.

Synthesis and Spectroscopic, Thermal and Electrochemical Studies of Mixed-ligand Complexes of Silver(I) with Derivatives of Benzoyltrifluoroacetonate and 4,4ʹ-Bipyridine, Including the Crystal Structure of [Ag(4,4ʹ-bpy)(tfcpb)]n

2012 ◽  
Vol 67 (5) ◽  
pp. 465-472 ◽  
Author(s):  
Farzin Marandi ◽  
Afsaneh Marandi ◽  
Ingo Pantenburg ◽  
Gerd Meyer
Keyword(s):  
Crystal Structure ◽  
Nmr Spectroscopy ◽  
Weak Interactions ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Electrochemical Studies ◽  
One Dimensional ◽  
H Nmr ◽  
Elemental Analyses ◽  
Derivatives Of

Three new mixed-ligand complexes of silver(I) with 4,4ʹ-bipyridine and derivates of benzoyltrifluoroacetone (Htfpb: 4,4,4-trifluoro-1-phenyl-1,3-butandione, Htfcpb: 4,4,4-trifluoro-1-(4- chlorophenyl)-1,3-butandione and Htfmpb: 4,4,4-trifluoro-1-(4-methoxyphenyl)-1,3-butandione) were synthesized and characterized by elemental analyses and 1H NMR spectroscopy. Thermal and electrochemical properties were also studied. The single-crystal structure of [Ag(4,4ʹ-bpy)(tfcpb)]n shows a one-dimensional coordination polymer as a result of 4,4ʹ-bpy bridging. The four-coordinate Ag(I) ions are linked into double chains by Ag...O contacts, which are extended into a 3D supramolecular structure through abundant weak interactions, such as μ...μ, C-H...F, C-H...O, C-H...Cl and F...F contacts.

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