The purpose of this paper is to show how symmetry selection rules can be used to determine whether certain of the electronic transitions exhibited by the title compounds are allowed or forbidden by symmetry. (Author/CP)

Reviews the phase transfer technique for conducting reactions between molecules with widely different solubility properties. (SL)

Discusses the perturbational molecular orbital (PMO) approach for qualitative prediction of reactivities and stabilities of organic molecules. (SL)

Describes a 12 hour minicourse in Huckel molecular orbital (HMO) theory presented as part of a senior level chemical bonding course. (SL)

Provides prize exam questions utilized by other teachers in the assessment of analytical techniques and molecular orbital theory. (SL)

Discusses the diversity of names used for various types of polymeric materials. Concentrates on the naming of linear organic polymers. Delineates these polymers by discussing common names, source-based names, characteristic group names, and structure-based names. Introduces the specifications of tacticity and geometric isomerism. (TW)

Describes a procedure for teaching the "generator orbital" (GO) approach of molecular orbital bonding in polyatomic molecules. Explains how the GO can be utilized with students in generating the vibrational, rotational, and translational modes of molecules in a completely pictorial manner. (ML)

Proposes a model for kinetic processes said to be similar in computational effort and yielding similar results to conventional transition state theory (TST), while maintaining parsimony and credulity. Argues that partitioning of states into groups be limited to energy space in contrast to TST. (JM)

Structural form, bonding scheme, and chromatin structure of and gene-modification experiments with deoxyribonucleic acid (DNA) are described. Indicates that DNA's double helix is variable and also flexible as it interacts with regulatory and other molecules to transfer hereditary messages. (DH)

Highlights five major analytical areas (electrophoresis, immunoassay, chromatographic separations, protein and DNA sequencing, and molecular structures determination) and discusses how analytical chemistry could further improve these techniques and thereby have a major impact on biotechnology. (JN)

Investigated use of overhead transparencies containing a sequence of diagrams to represent a three-dimensional structure at different stages during a rotation. Significant learning occurred among 120 Bahraini boys (aged 15-16) when the transparencies contained multi-colored diagrams which were exposed simultaneously or individually in a cumulative…

Dynamic crystal model kits are described. Laboratory experiments in which students use these kits to build models have been extremely successful in providing them with an understanding of the three-dimensional structures of the common cubic unit cells as well as hexagonal and cubic closest-packing of spheres. (JN)

Briefly discusses Alfred Werner's discovery of the coordination theory of inorganic chemistry. (MLH)

Describes computer programs and projects designed to assist the chemical researcher in solving problems on-line. Discusses programs that interpret molecular structures, analyze multivariant data, and generate structural isomers of compounds. (MLH)

Describes a computer program that generates a random string of amino acids and guides the student in determining the correct sequence of a given protein by using experimental analytic data for that protein. (MLH)