Tris(trimethylsilyl)methyl and tris(dimethylphenylsilyl)methyl derivatives of boron. Crystal structures of dihydroxy[tris(trimethylsilyl)methyl]borane and of the lithium–boron complex [(MeOH)2Li(µ-OMe)2B(OMe)2]

Al-Juaid, Salih S.; Eaborn, C.; El-Kheli, Mohamed N. A.; Hitchcock, Peter B.; Lickiss, Paul D.; Molla, M. E.; Smith, J. David; Zora, Jalal A.

doi:10.1039/dt9890000447

Cited by 24 publications

(9 citation statements)

References 7 publications

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“…Although the common synthetic route to complexes of [(RO) 4 B] - with groups 1 and 2 metal ions has been via the reaction of (RO) 3 B with the RO - anion under strict exclusion of moisture and air, , methanolysis of commonly used reagents such as sodium tetrahydroborate and trihydrocyanoborate (leading to 1 ), tetraphenylborate (resulting in 2 ), and in this study, Borax, seems to proceed well without those limitations.…”

Section: Resultsmentioning

confidence: 83%

“…Although simple tetra-alkoxyborate anions ([(RO) 4 B] - R = alkyl group) have been known for about a century, relatively few reports on their coordination behavior exist. Most of the reported examples cover discrete complexes of groups one and two elements for which the bidentate coordination behavior of the [(RO) 4 B] - chelates is prominent. However, the [(CH 3 O) 4 B] - anion displays remarkable versatility as a template for metallopolymers of one-dimensional structural motifs.…”

Section: Introductionmentioning

confidence: 99%

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One-Pot Synthesis, Structure, and Unusual Luminescence of Novel One-Dimensional Lanthanide(III) Tetramethoxyborates

et al. 1999

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Detailed studies of formation, structure, and luminescence characteristics of novel ionically linked sinusoidal chains of [{Na}{(sal)(3)Ln(B(OCH(3))(4))Ln(sal)(3)}](n)() [Ln = Nd, Sm, Tb-Lu, Y (4); Ln = Eu (5); Ln = Gd (6)] was undertaken to assess the versatility of tetramethoxyborate anions as consistent general synthons for one-dimensional materials. Crystal data for [{Na}{(sal)(3)Nd(B(OCH(3))(4))Nd(sal)(3)}](n)() [4(Ln = Nd)]: monoclinic; space group, C2/c (15), a = 20.884(2) Å, b = 12.454(1) Å, c = 37.663(5) Å, beta = 102.09(2) degrees, Z = 8; [{Na}{(sal)(3)Eu(B(O CH(3))(4))Eu(sal)(3)}](n)() (5): monoclinic; space group, C2/c (15), a = 20.846(2) Å, b = 12.460(1) Å, c = 37.365(4) Å, beta = 102.17(1) degrees, Z = 8. Europium luminescence from [{Na}{(sal)(3)Ln(1)(-)(x)()Eu(x)()(B(OCH(3))(4))Ln(1)(-)(x)()Eu(x)()(sal)(3)}](n)() [Ln = Eu (5); Gd (7-11), Y (12), Dy (13-18), Dy/Gd (19)] reveals the presence of defect Eu(3+) sites, possibly resulting from swapping regular Eu(3+) and Na(+) positions. Strong Eu(3+)-Eu(3+) electronic interactions result in multidimensional energy migration and a dynamic excitation energy-transport regime. Efficient thermally activated regular Eu(3+)-to-defect Eu(3+) back-energy transfer dominates at 297 K.

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Section: Resultsmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis, Structure, and Unusual Luminescence of Novel One-Dimensional Lanthanide(III) Tetramethoxyborates

et al. 1999

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“…Several structures containing B(OMe) 4 - have been reported, − and it is appropriate to compare the structural features in the complex with those in the anion. Interestingly, all of the structures containing B(OMe) 4 - show a tetragonally distorted pseudo-tetrahedral anion geometry.…”

Section: Resultsmentioning

confidence: 99%

Aerosol Synthesis of Spherical Morphology Boron Nitride Powders from Organoborate Precursors

et al. 2006

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The reaction of aerosol droplets of the organoborate reagent (MeO)3B, suspended in nitrogen, with gaseous ammonia in a flight tube heated to 800−1500 °C was used to produce, in high yield, spherical morphology precursor powders BN x O y Cz that contain decreasing amounts of oxygen and carbon as the process temperature and mole fraction of ammonia increased. Subsequent static nitridation of the precursor powder under ammonia gave spherical morphology BN powders with low (<1 wt %) oxygen and carbon contents. The powders were characterized by elemental analysis, DRIFT-IR, XRD, SEM, and TEM methods. A weak molecular complex (MeO)3B·NH3 has been previously reported to exist, and this species was isolated and structurally characterized by single-crystal X-ray diffraction methods. Aerosol conversions using (MeO)3B/MeOH, H3BO3/MeOH, and B2O3/MeOH solutions were also examined, and the results are briefly described.

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“…Examination of previous structures of organic salts (with`free' O atoms; BAZFAJ, NEMYOT and RAVPAF) shows that these have a wide range of BÐO and CÐO distances, while in the comparable sodium salt (TMXBNA), the ranges are 1.461±1.482 and 1.426±1.440 A Ê , respectively. Ranges in other metal salts [HOSXES and the lithium complex KAJPOA (Al-Juaid et al, 1989)] are similar, with slightly lower minimum values (1.440±1.481 and 1.418± 1.443 A Ê ). We conclude that no de®nitive conclusions can be made about variations in bond strengths on the basis of current studies.…”

Section: Commentmentioning

confidence: 86%

Poly[di-μ₂-methanolato-di-μ₂-tetramethoxyborato-disodium(I)]

Gainsford¹,

Kemmitt²

2005

Acta Crystallogr C

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In the polymeric title compound, [Na2(C4H12BO4)2(CH4O)2]n, the two independent sodium cations are bound by five O atoms. All the O atoms of one tetramethoxyborate anion bind cations, forming a tetrameric cluster around a tetragonal inversion centre [Na-O = 2.2777 (18)-2.3907 (16) A]. Two methanol O atoms bridge the two Na atoms [Na-O = 2.3590 (15)-2.4088 (18) A] and provide the hydrogen-bonding H atoms. The second tetramethoxyborate anion provides two O atoms to one Na atom [mean Na-O = 2.31 (2) A] and two O atoms as donors for crosslinking hydrogen bonds to adjacent tetramers, which complete the three-dimensional packing. The crystal was a treated as a racemic twin.

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Tris(trimethylsilyl)methyl and tris(dimethylphenylsilyl)methyl derivatives of boron. Crystal structures of dihydroxy[tris(trimethylsilyl)methyl]borane and of the lithium–boron complex [(MeOH)₂Li(µ-OMe)₂B(OMe)₂]

Cited by 24 publications

References 7 publications

One-Pot Synthesis, Structure, and Unusual Luminescence of Novel One-Dimensional Lanthanide(III) Tetramethoxyborates

One-Pot Synthesis, Structure, and Unusual Luminescence of Novel One-Dimensional Lanthanide(III) Tetramethoxyborates

Aerosol Synthesis of Spherical Morphology Boron Nitride Powders from Organoborate Precursors

Poly[di-μ₂-methanolato-di-μ₂-tetramethoxyborato-disodium(I)]

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Tris(trimethylsilyl)methyl and tris(dimethylphenylsilyl)methyl derivatives of boron. Crystal structures of dihydroxy[tris(trimethylsilyl)methyl]borane and of the lithium–boron complex [(MeOH)2Li(µ-OMe)2B(OMe)2]

Cited by 24 publications

References 7 publications

One-Pot Synthesis, Structure, and Unusual Luminescence of Novel One-Dimensional Lanthanide(III) Tetramethoxyborates

One-Pot Synthesis, Structure, and Unusual Luminescence of Novel One-Dimensional Lanthanide(III) Tetramethoxyborates

Aerosol Synthesis of Spherical Morphology Boron Nitride Powders from Organoborate Precursors

Poly[di-μ2-methanolato-di-μ2-tetramethoxyborato-disodium(I)]

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Tris(trimethylsilyl)methyl and tris(dimethylphenylsilyl)methyl derivatives of boron. Crystal structures of dihydroxy[tris(trimethylsilyl)methyl]borane and of the lithium–boron complex [(MeOH)₂Li(µ-OMe)₂B(OMe)₂]

Poly[di-μ₂-methanolato-di-μ₂-tetramethoxyborato-disodium(I)]