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If there are multiple chiral carbons, e.g. (1R,4S), a number specifies the location of the carbon preceding each configuration. [12] The R/S system also has no fixed relation to the D/L system. For example, the side-chain one of serine contains a hydroxyl group, −OH.
Montage, using ball-and-stick models, of the three steps in an S N 2 reaction.The nucleophile is green, the leaving group is red and the three substituents are orange. The S N 2 reaction causes inversion of stereochemical configuration, known as Walden inversion.
E–Z configuration, or the E–Z convention, is the IUPAC preferred method of describing the absolute stereochemistry of double bonds in organic chemistry. It is an extension of cis – trans isomer notation (which only describes relative stereochemistry ) that can be used to describe double bonds having two, three or four substituents .
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A configuration is a set containing the positions of all particles of the body. strain hardening strength of materials stress 1. An applied force or system of forces that tends to strain or deform a physical body. 2. A measure of the internal forces acting within a deformable body. 3.
The Namco System 11 [a] is a 32-bit arcade system board developed jointly by Namco and Sony Computer Entertainment.Released in 1994, the System 11 is based on a prototype of the PlayStation, Sony's first home video game console, [1] using a 512 KB operating system and several custom processors.
CM—Configuration management; CM—Content management; CMDB—Configuration management database; CMMI—Capability Maturity Model Integration; CMOS—Complementary metal–oxide–semiconductor; CMS—Content management system; CN—Canonical Name; CN—Common Name; CNC—Computerized numerical control; CNG—Cryptographic Next Generation
Two wires twisted around each other, possibly covered with an overall sheath; this configuration rejects some kinds of interference. two-phase electric power An electric power system using two sets of alternating currents, displaced in time by a quarter period. two-port network A network that has two places to exchange energy with its surroundings.