Related Experiment Video
Updated: May 8, 2026
Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
Published on: March 20, 2017
Improved syntheses, and structural and electronic characterization of carboxamide-substituted Tp(CONHPh,Me) and
Eric R Sirianni1, Glenn P A Yap, Eser S Akturk
1Department of Chemistry and Biochemistry, Center for Catalytic Science and Technology, University of Delaware, Brown Laboratory, Newark, DE 19716, USA.
Abstract:
Improvements in the syntheses of the carboxamide-substituted tris(pyrazolyl)borate ligands Tp(CONHPh,Me) [tris(3-anilinocarbonyl-5-methylpyrazol-1-yl)borate] and Tp(CONHt-Bu,Me) [tris(3-tert-butylaminocarbonyl-5-methylpyrazol-1-yl)borate] are reported. Their Tl(I) salts, namely [tris(3-anilinocarbonyl-5-methylpyrazol-1-yl-κN(2))borato]thallium(I), [Tl(C33H31BN9O3)], (II), and [tris(3-tert-butylaminocarbonyl-5-methylpyrazol-1-yl-κN(2))borato]thallium(I), [Tl(C27H43BN9O3)], (III), as well as the Cu(I) carbonyl complexes (Tp(CONHPh,Me))Cu(CO), namely carbonyl[tris(3-anilinocarbonyl-5-methylpyrazol-1-yl-κN(2))borato]copper(I) tetrahydrofuran trisolvate, [Cu(C33H31BN9O3)(CO)]·3C4H8O, (IV), and (Tp(CONHt-Bu,Me))Cu(CO), namely carbonyl[tris(3-tert-butylaminocarbonyl-5-methylpyrazol-1-yl-κN(2))borato]copper(I) tetrahydrofuran hemisolvate, [Cu(C27H43BN9O3)(CO)]·0.5C4H8O, (V), have been prepared. Their spectroscopic properties and structures are compared with those of related compounds. The molecules of (II)-(V) show hydrogen bonding to either solvent molecules or neighboring complex molecules via amide groups. The title compounds feature the ability to engage other ligands in hydrogen bonding and they show strong electron-withdrawing character. Compound (V) displays voids of ca 800 Å(3) in the crystal structure.
More Related Videos
06:35Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
12:30Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
Published on: April 9, 2018
Related Concept Videos
02:34Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
02:42Valence Bond Theory
02:52Stereoisomerism
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
02:11Conformations of Cyclohexane
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal tetrahedral value,...
01:18Aromatic Hydrocarbon Cations: Structural Overview
Removing one hydrogen from the intervening CH2 group with both...
00:43Complexometric Titration: Ligands