منابع مشابه
Algebraic structure of central molecular chirality starting from Fischer projections.
The construction of algebraic structure of central molecular chirality is provided starting from the empirical Fischer projections for tetrahedrons. A matrix representation is given and the algebra of O(4) orthogonal group for rotations and inversions is identified. The result can be generalized to chains of connected tetrahedrons.
متن کاملMolecular Chirality and Chiral Parameters
Chirality permeates the entire fabric of the biological world. Indeed, life as we know it could not exist without chirality. The function of fundamental components of the cell, like actin, myosin, proteins, and lipids, relies upon their being chiral. The handedness of a molecule can affect its odor, potency, and toxicity. Thus the synthesis of a single enantiomer of a compound is crucial for th...
متن کاملControl of molecular chirality
We present a theoretical study of controlling molecular chirality in chemical reactions by circularly polarized fields. A theory of absolute asymmetric synthesis is formulated by standard perturbation theory. An estimation of the chiral polarization of the product is provided. We show that an unstable chiral configuration can be described as a spin one-half particle. The circularly polarized fi...
متن کاملGeometrical approach to central molecular chirality: a chirality selection rule.
Chirality is of primary importance in many areas of chemistry and has been extensively investigated since its discovery. We introduce here a description of central chirality for tetrahedral molecules using a geometrical approach based on complex numbers. According to this representation, for a molecule having n chiral centers it is possible to define an "index of chirality chi." Consequently, a...
متن کاملChirality-dependent friction of bulk molecular solids.
We show that the solid-solid friction between bulk chiral molecular solids can depend on the relative chirality of the two materials. In menthol and 1-phenyl-1-butanol, heterochiral friction is smaller than homochiral friction, while in ibuprofen, heterochiral friction is larger. Chiral asymmetries in the coefficient of sliding friction vary with temperature and can be as large as 30%. In the t...
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ژورنال
عنوان ژورنال: Journal of Chemical Education
سال: 1990
ISSN: 0021-9584,1938-1328
DOI: 10.1021/ed067p358.2