calumniate
发表于 2025-3-25 06:15:38
Adnan Badran,Elias Baydoun,John R. Hillman2. The steps by which it was finally possible to distinguish between these structures reveal both the power and limitations of various methods of structure determination, and are briefly outlined in the following section.
水汽
发表于 2025-3-25 11:27:03
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–DOX
发表于 2025-3-25 15:16:42
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地名表
发表于 2025-3-25 17:31:07
Structures and bonding of some higher boranes and boron polyhedra,ugh an understanding of the overall distribution of the valence electrons of diborane required a molecular orbital treatment which took into account the symmetry of the whole molecule. The concept of three-centre electron-pair bonds can profitably be applied to a wide variety of other electron defic
instructive
发表于 2025-3-25 23:30:48
The general chemistry of the boron hydrides,nd feeble intermolecular forces. Their reactivities have a thermodynamic origin in that these compounds are markedly unstable with respect to replacement of their boron-boron and boron-hydrogen links by bonds to more electronegative elements. Some thermodynamic data bearing on this are in Tables 4-1
Blood-Clot
发表于 2025-3-26 02:03:12
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irreducible
发表于 2025-3-26 06:40:03
Carboranes,esidues are attached to typical boron hydride residues by what may be regarded as localized two-centre electron-pair bonds. Examples of such organoboranes include the methyldiboranes Me.B.H. (where . can equal 1, 2, 3, or 4 but significantly . 5 or 6) and similar derivatives of higher boranes in whi
PANIC
发表于 2025-3-26 12:20:05
Other examples of electron deficient bonding,be allocated to every pair of atoms close enough to be regarded as covalently bonded. The types of compound covered by this definition have included at one extreme substances like diborane, in which the electron deficiency is effectively localized in one section of the molecule, a section which acco
Altitude
发表于 2025-3-26 15:13:13
Rosaline May Lee,Yanyue (Selena) Yuans that figure in the hydride, halide, and alloy chemistry of boron as well as in the element itself, structures in which boron atoms are located at the corners of the equilateral triangular faces of polyhedra containing no bridging hydrogens. Bonding schemes for such structures are best arrived at b
Chandelier
发表于 2025-3-26 17:41:04
Structures and bonding of some higher boranes and boron polyhedra,s that figure in the hydride, halide, and alloy chemistry of boron as well as in the element itself, structures in which boron atoms are located at the corners of the equilateral triangular faces of polyhedra containing no bridging hydrogens. Bonding schemes for such structures are best arrived at b