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Homoaromaticity, in organic chemistry, refers to a special case of aromaticity in which conjugation is interrupted by a single sp 3 hybridized carbon atom. Although this sp 3 center disrupts the continuous overlap of p-orbitals, traditionally thought to be a requirement for aromaticity, considerable thermodynamic stability and many of the spectroscopic, magnetic, and chemical properties ...
2[((CH 3) 3 Si) 2 N] 2 S + 2SCl 2 + 2SO 2 Cl 2 → S 4 N 4 + 8 (CH 3) 3 SiCl + 2SO 2 Tetraselenium tetranitride , Se 4 N 4 , is a compound analogous to tetrasulfur tetranitride and can be synthesized by the reaction of selenium tetrachloride with [((CH
IUPAC states that, "As one of its major activities, IUPAC develops Recommendations to establish unambiguous, uniform, and consistent nomenclature and terminology for specific scientific fields, usually presented as: glossaries of terms for specific chemical disciplines; definitions of terms relating to a group of properties; nomenclature of chemical compounds and their classes; terminology ...
Bismuth has the longest known α-decay half-life, though tellurium-128 has a double beta decay half-life of over 2.2 × 10 24 years. [ 43 ] Six isotopes of bismuth with short half-lives (210–215 inclusive) occur in the natural radioactive decay chains of actinium , radium , thorium , and neptunium ; and more have been synthesized.
[1] [2] [3] Most are based on two hydroxyphenyl functional groups linked by a methylene bridge. Exceptions include bisphenol S, P, and M. "Bisphenol" is a common name ; the letter following denotes the variant, which depends on the additional substituents.
-bis, an IUPAC numerical multiplier for compound or complex features, meaning 2; A colloquial name for N,N'-Methylenebisacrylamide; Barratt Impulsiveness Scale, in psychology; Behavioural Inhibition System, a brain-behavioral systems in reinforcement sensitivity theory; BIS monitor or bispectral index, to assess the depth of anaesthesia
In today's puzzle, there are eight theme words to find (including the spangram). Hint: The first one can be found in the top half of the board. Here are the first two letters for each word:
Examples of the double sandwich include V 2 2, [20] Ni 2 2 [21] and Cr 2 (pentalene) 2. Depicted at right is an example of a multimetallic sandwich compound, which has four palladium atoms joined in a chain sandwiched between two perylene units. [22] The counterions are bulky tetraarylborates.