Bis borates

Classic A/-heterocychc ligands, eg, bipyridyl (bipy), terpyridyl, imidazole, pyrazine, phenanthroline, piperazine (including alkyl- and aryl-substituted derivatives), and polypyrazol-l-yl-borates (bis, tris, and tetra), have all been found to coordinate Th(IV) chlorides, perchlorates, and nitrates. The tripodal hydrotris(pyrazolyl)borates, HBPz, have been used to stabilize organometaHic complexes (31). Bis-porphyrin Th(IV) "sandwich" complexes have been... 

Oxirane ergeben mit Natrium-trithio-dihydrido-borat Bis-[2-hydroxy-alkyl]-di-sulfane, die mit Lithiumalanat zu 2-Hydroxy-thiolen gespalten werden z.B.4 ... 

Borat (Bis-[ammoniak]-dime-thylboretio)-Dimethyl-dihydro-XIII/3b, 818... 

Borat Bis-[pyrazolo]-diethyl-(Natrium) XIIl/3b, 860f. 

Borat Bis-[3,5-dimethyl-pyrazolo]-dimethyl- (Na-Salz) XIII/3b, 860... 

The following abbreviations are used here Tp = tris(pyrazolyl)borate Tp P = tris(3- (4-t-butyl)-pyrid-2-yl -pyrazol-l-yl)borate Tp = Hydrotris[3-(carboxypyrrolidido)pyrazol-l-yl]borate Tp = tris-(3,5-dimethylpyrazolyl)borate jpMe2,4Et tris(3,5-dimethyl-4-ethylpyrazolyl) borate Tp = tris (3-mesitylpyrazolyl)borate = bis(3-mesitylpyrazolyl)(5-mesitylpyrazolyl) borate Tp = tris... 

Carmona also saw ethylene activation with the tris-(3,5-dimethylpyra-zolyl)borate-bis-ethyleneiridium(I) complex, but there are two main differences from Crabtree s results. First, reaction occurs thermally in solution at 60°C. Second, the C-H insertion complex undergoes further C-C coupling to give an allyl hydride product (Eq. 38) [128]. 

Inorganic analytical appHcations for ben2otrifluoride derivatives include sodiumtetrakis[3,5-bis(trifluoromethyl)phenyl]borate (Kobayashi s reagent) (345), and 4-(2,6-dinitro-4-trifluoromethylphenyl)aminoben2o-15-crown-5 (modified Takagi reagent (346). 

The use of an electron-accepting counter ion leads to a photochromic system that is highly reversible under an inert atmosphere. An anion that has been used successfully is tetra-bis[3,5-di(trifluoromethyl)phenyl]borate anion [79250-20-9], C22H22BF 24 ( )-... 

The phase relations, stoichiometry and structural chemistry of the metal borates have been extensively studied because of their geochemical implications and technological importance. Borates are known in which the structural unit is mononuclear (1 B atom), bi-, tri-, tetra- or penta-nuclear, or in which there are polydimensional networks including glasses. The main structural principles underlying the bonding in crystalline metal borates are as follows " ... 

Abbreviations aapy, 2-acetamidopyridine Aik, alkyl AN, acetoniuile Ar, aryl Bu, butyl cod, 1,5-cyclooctadiene COE, cyclooctene COT, cyclooctatetraene Cp, cyclopentadienyl Cp , penta-methylcyclopentadienyl Cy, cyclohexyl DME, 1,2-dimethoxyethane DME, dimethylformamide DMSO, dimethyl sulfoxide dmpe, dimethylphosphinoethane dppe, diphenylphosphinoethane dppm, diphenylphosphinomethane dppp, diphenylphosphinopropane Et, ethyl Ec, feirocenyl ind, inda-zolyl Me, methyl Mes, mesitylene nb, norbomene orbicyclo[2.2.1]heptene nbd, 2,5-norbomadiene OTf, uiflate Ph, phenyl PPN, bis(triphenylphosphoranylidene)ammonium Pi , propyl py, pyridine pz, pyrazolate pz, substituted pyi azolate pz , 3,5-dimethylpyrazolate quin, quinolin-8-olate solv, solvent tfb, teti afluorobenzobaiTelene THE, tetrahydrofuran THT, tetrahydrothiophene tmeda, teti amethylethylenediamine Tol, tolyl Tp, HB(C3H3N2)3 Tp , HB(3,5-Me2C3HN2)3 Tp, substituted hydrotiis(pyrazol-l-yl)borate Ts, tosyl tz, 1,2,4-triazolate Vin, vinyl. 

Cyclooctane-l,5-diyl-bis(pyrazol-l-yl)borate (L) with cobalt(II), nickel(II), and zinc(II) nitrates gives [(j -L)M] (M = Co, Ni, Zn) strongly stabilized by the C—H M agostic interactions, which justifies their inclusion in the class of organometallic complexes [89AGE205, 91ICA(183)203, 92IC974]. 

Ionic liquids [EMIM] bis(l,2-oxalato-0,0 )borate Merck Patent GmbH, Germany 2001 23... 

Discussion. The method is based upon the complexation of boron as the bis(salicylato)borate(III) anion (A), (borodisalicylate), and the solvent extraction into chloroform of the ion-association complex formed with the ferroin. 

They show high thermal stability for example the decomposition temperature of lithium bis[2,2 -biphenyldiolato(2-)0,0 ] borate is 270 °C [80],... 

Figure 8. Linear correlation of HOMOcO energies and anodic oxidation limits of lithium borates Li[B(C6 H4 jF102)2], x=0 (1), x=l (2), and x=4 (3) Li[B( O2C 0H6)2l (4) lithium bis[salicylato (2-)]borate (6) and lithium bis [ 2,2 - biphenyldio-lato (2 -) -0,0 lborate (5).

There is a difference in the behavior of benzenediolatoborate and naphthalenedio-latoborate solutions on the one hand, and lithium bis[2,2 -biphenyldiolato(2-)-0,0 ] borate (point 5 in fig. 8) lithium bis[ sali-cylato (2-) Jborate (point 6) or benzene-diolatoborate/phenolate mixed solutions on the other (Fig.8). This can be tentatively explained by the assumption of different decomposition mechanisms due to different structures, which entail the formation of soluble colored quinones from benzenediolatoborate anions and lithium-ion conducting films from solutions of the latter compounds (points 5 and 6) [80], The assumption of a different mechanism and the formation of a lithium-ion conducting, electronically insulating film is supported by... 

Figure 9. CV of 0.2 mol kg 1 lithium bis[2,2 -biphenyldiolato(2-)-0,0 ]borate solution in PC at a stainless steel electrode, area 0.5 cm 2, showing the passivation of the electrode.

CV of solutions of lithium bis[ salicy-lato(2-)]borate in PC shows mainly the same oxidation behavior as with lithium bis[2,2 biphenyldiolato(2-)-0,0 ] borate, i.e., electrode (stainless steel or Au) passivation. The anodic oxidation limit is the highest of all borates investigated by us so far, namely 4.5 V versus Li. However, in contrast to lithium bis[2,2 -biphenyl-diolato(2-)-0,0 Jborate based solutions, lithium deposition and dissolution without previous protective film formation by oxidation of the anion is not possible, as the anion itself is probably reduced at potentials of 620-670 mV versus Li, where a... 

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