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A reaction intermediate in which the bond arrangement around an initially double-bonded carbon atom (typically a carbonyl carbon atom) has been transformed from trigonal to tetrahedral. For example, aldol in the condensation reaction of acetaldehyde (but most tetrahedral intermediates have a more fleeting existen
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thermal transient testing definition
a technique for evaluating the integrity of semiconductor die attachment. Semiconductor die are sensitive to voids in the die attach medium-organic resin, metal alloys, or solders. The voids impede the flow of heat away from the die to the package...
tool definition
1 : an instrument, machine, or device used to perform a task or to measure a characteristic or quality. 2 : any piece of semiconductor fabrication or inspection equipment designed to process wafers delivered in cassettes or cassettes in containers...
Thin-layer chromatography (TLC) definition
Thin-layer chromatography (TLC) is a chromatographic technique that is useful for separating organic compounds. Because of the simplicity and rapidity of TLC, it is often used to monitor the progress of organic reactions and to check the purity of...
thiols definition
Compounds having the structure RSH (R not equal to H). Also known by the term mercaptans (abandoned by IUPAC). NOC Rule C-511.2. E.g. MeCH2SH ethaneth
Thermal analysis (introduction) definition
Thermal analytical methods monitor differences in some sample property as the temperature increases, or differences in temperature between a sample and a standard as a function of added heat. These methods are usually applied to solids to...
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