Borates, tetrachloro

B-C bonds, 3, 97 B-N bonds, 3, 97 B-O bonds, 3,94 B-P bonds, 3, 97 B-Si bonds, 3, 97 oxo acid anion complexes, 3, 96 Borates, alkoxo-, 3, 94 Borates, amidotrihydro-, 3,92 Borates, aryloxo-, 3, 94 Borates, carboxylato-, 3,96 Borates, catechol, 3,95 Borates, chlorosulfato-, 3,97 Borates, dicarboxylato-, 3,96 Borates, dipyrazol-l-yl-, 3, 92 Borates, halogeno-, 3,92 Borates, halogenohydro-, 3,90 Borates, hydro-, 3,90 Borates, hydrohydroxo-, 3,90 Borates, hydropyrazol-l-yl-, 3, 92 Borates, hydroxo-, 3,94 Borates, hydroxycarboxylato-, 3,96 Borates, inositol, 3, 95 Borates, monoalkyl-, 3, 92 Borates, monophosphido-, 3, 92 Borates, peroxohydroxo-, 3, 94 Borates, polyol, 3, 95 Borates, pyrrol-l-yl-, 3, 92 Borates, sulfato-, 3, 97 Borates, tetrabromo-, 3, 92 Borates, tetrachloro-, 3, 92 Borates, tetrafluoro-, 3, 92 minerals, 6, 847 Borates, tetrahalogeno-mixed, 3, 93 nB NMR, 3, 92 Borates, tetraiodo-, 3, 92 Borates, tetranitrato-, 3, 96 Borates, tetraperchlorato-, 3, 97 Borates, tripyrazol-l-yl-, 3, 92 Borax, 3,101 Borazines... 

Borates, inositol, 95 Borates, monoalkyl-, 92 Borates, monophosphido-, 92 Borates, peroxohydroxo-, 94 Borates, polyol, 95 Borates, pynol-l-yl-, 92 Borates, sulfato-, 97 Borates, tetrabromo-, 92 Borates, tetrachloro-, 92 Borates, tetrafluoro-, 92 Borates, tetrahalogetio-mixed, 93 B NMR, 92 Borates, tetraiodo-, 92 Borates, tetranitrato-, 96... 

Nevertheless, a few years ago, Kennedy 66 69) developed a method yielding co-functional polymers by cationic polymerization of vinyl monomers. The principle of the socalled inifer method is to kinetically favor transfer to the initiating species with respect to all other kinds of transfer reactions (especially the transfer to monomer). A typical initiating system is composed of an allyl or benzyl halide and boron trichloride BCl3. This mixture behaves like an alkenium tetrachloro-borate and readily initiates the polymerization of monomers such as isobutene or a-methylstyrene. The efficiency of the halide as a transfer agent depends on the lability of the C—Cl bond and on the molar ratio [RC1]/[BC13],... 

Thompson and Davis have also considered the effects of electronegativity on the B chemical shift of tetraborate ions [BXj . No direct correlation was found between the measured chemical shift and the electronegativity of X although the shift of the tetraiodo-, tetra-bromo- and tetrachloro-borate ions were in the expected order, the shift of the tetrafluoro- and tetra(phenylacetylene)-borates were unusually high. For the boron trihalides, BX3, Good and Ritter had suggested that the B chemical shift was given by—... 

The authors found the values of A, B and C by substitution of the observed shifts of the tetrafluoro-, tetrachloro- and tetrabromo-borate ions. Consequently the equation for the observed shift in p.p.m. is given by the expression—... 

With Fe2(CO)9 as catalyst, the CDC reaction of saturated heterocycles with 1,3-diketones was accomplished using TBP as an eflhcient oxidant (Scheme 2.12) [48]. This protocol shows good compatibility to cyclic and acyclic ethers, thioe-thers, and tertiary amines. Gratifyingly, besides C(sp )-C(sp ) coupling, the oxidative C-N coupling of ethers with azoles also works well (Scheme 2.12) [49]. As a update, with 2-chloranil (tetrachloro-l,2-benzoquinone) as oxidant, benzyl thioethers can be employed as substrates under metal-free conditions [50]. Notably, 2,2,6,6-tetramethylpiperidine-l-oxoammonium tetrafluoro borate is also an effective oxidant for metal-free CDC reaction of isochromanes and carbonyl compounds [51, 52]. 

Obtained by reaction of m-nitrobenzoyl chloride with m-tolyl borate in the presence of aluminium chloride in tetrachloro-ethane at 100° (25%) [55]. 

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