The title compound, C(14)H(19)N(2) (+)·BF(4) (-), was obtained by reaction of 1-ethyl-3-(2,4,6-trimethyl-phen-yl)imidazolium tetra-fluoro-borate with sodium tetra-fluoro-borate. The imidazole ring makes a dihedral angle of 78.92 (13)° with the benzene ring.

Simple borates serve as effective promoters for amide bond formation with a variety of carboxylic acids and amines. With trimethyl or tris(2,2,2-trifluoroethyl) borate, amides are obtained in good to excellent yield and high purity after a simple work-up procedure. Tris(2,2,2-trifluoroethyl) borate can also be used for the straightforward conversion of primary amides to secondary amides via tra...

Calcium ions (Ca(2+)), protons (H(+)), and borate (B(OH)(4)(-)) are essential ions in the control of tip growth of pollen tubes. All three ions may interact with pectins, a major component of the expanding pollen tube cell wall. Ca(2+ )is thought to bind acidic residues, and cross-link adjacent pectin chains, thereby strengthening the cell wall. Protons are loosening agents; in pollen tube wall...

Elongation factor T, (EF-T,) is inactivated by the arginine-specific reagent 2,3-butanedione. Excess elongation factor T, (EF-T,), the protein substrate for EFT,, protects EF-T, from this inactivation. Borate ion affects the inactivation kinetics in a manner consistent with the formation of an arginine residueebutanedione l borate complex. The butanedione inactivation is rapidly reversible in t...

The reaction of Ln(AlMe(4))(3) with bulky hydrotris(pyrazolyl)borate (Tp(t)(Bu,Me))H proceeds via a sequence of methane elimination and C-H bond activation, affording unprecedented rare-earth metal ligand moieties including Ln(Me)[(micro-Me)AlMe(3)] and X-ray structurally characterized "Tebbe-like" Ln[(micro-CH(2))(2)AlMe(2)].

The title compound, KZnB(3)O(6) contains a remarkable [B(6)O(12)](6-) group ( symmetry) formed by two rings linked by edge-sharing BO(4) tetra-hedra, a feature that has only been observed previously under high pressure conditions. These borate groups are connected through distorted ZnO(4) tetra-hedra in edge-shared pairs ( symmetry), forming a three-dimensional network whose cavities are filled...

A novel potentiometric ion-selective PVC membrane sensor for analysis of atorvastatin (AT) in pharmaceutical preparations based on atorvastatin-(tetraphenyl borate), (AT-(TPB)2) as sensing element, tetraphenyl borate as additive and tris-2-ethyl-hexyl phosphate (TOP) as plasticizer solvent was prepared. The electrode shows a good Nernestian response over the concentration range of 0.09–5586 µ...