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A solid with extensive hydrogen bonding will be considered a molecular solid, yet strong hydrogen bonds can have a significant degree of covalent character. As noted above, covalent and ionic bonds form a continuum between shared and transferred electrons; covalent and weak bonds form a continuum between shared and unshared electrons.
1,H-Pentafluorocyclobut-1-ene [140] 1,H:2,H-hexafluorocyclobutane [140] Tetramethylsilane 26.7 °C; Chlorosyl trifluoride 27 °C; 2,2-Dichloro-1,1,1-trifluoroethane 27.8 °C; Perfluoroethyl 2,2,2-trifluoroethyl ether 27.89 °C; Perfluoroethyl ethyl ether 28 °C; Perfluorocyclopentadiene C 5 F 6 28 °C [152] 2-Butyne 29 °C; Digermane 29 °C
Methylene imine is an organic compound with the chemical formula H 2 C=NH. The simplest imine , it is a stable, colorless gas that has been detected throughout the universe. [ 1 ] Structural parameters determined by microwave spectroscopy include a C=N bond length of 1.27 Å , an N–H bond length of 1.02 Å and an H−N=C bond angle of 110.5 ...
Prominent members include ammonia, hydrogen fluoride, sulfuric acid, hydrogen cyanide. Ammonia (and several amines as well) are useful for the generating solutions of highly reducing species because the N-H bond resists reduction. The chemistry of electrides and alkalides relies on amine solvents.
The general notation for hydrogen bonding is Dn−H···Ac, where the solid line represents a polar covalent bond, and the dotted or dashed line indicates the hydrogen bond. [6] The most frequent donor and acceptor atoms are nitrogen (N), oxygen (O), and fluorine (F), due to their high electronegativity and ability to engage in stronger ...
The B−N distance is 1.58(2) Å. The B−H and N−H distances are 1.15 and 0.96 Å, respectively. Its similarity to ethane is tenuous since ammonia borane is a solid and ethane is a gas: their melting points differing by 284 °C. This difference is consistent with the highly polar nature of ammonia borane.
A general linear imide functional group. In organic chemistry, an imide is a functional group consisting of two acyl groups bound to nitrogen. [1] The compounds are structurally related to acid anhydrides, although imides are more resistant to hydrolysis.
A well-studied example is the radical ion salt TTF-TCNQ with a conductivity of 5 x 10 2 Ω −1 cm −1, [5] much closer to copper (ρ = 6 x 10 5 Ω −1 cm −1) [8] than many molecular solids. [ 31 ] [ 18 ] [ 30 ] The coulombic interaction in TTF-TCNQ stems from the large partial negative charge (δ = -0.59) on the cyano- moiety on TCNQ at ...