Trans prefix

Isomeric alkenes may be either constitutional isomers or stereoisomers There is a sizable barrier to rotation about a carbon-carbon double bond which corresponds to the energy required to break the rr component of the double bond Stereoisomeric alkenes are configurationally stable under normal conditions The configurations of stereoisomeric alkenes are described according to two notational systems One system adds the prefix CIS to the name of the alkene when similar substituents are on the same side of the double bond and the prefix trans when they are on opposite sides The other ranks substituents according to a system of rules based on atomic number The prefix Z is used for alkenes that have higher ranked substituents on the same side of the double bond the prefix E is used when higher ranked substituents are on opposite sides... 

CIS (Section 3 11) Stereochemical prefix indicating that two substituents are on the same side of a nng or double bond (Contrast with the prefix trans )... 

The prefix trans comes from the Latin word for across and the prefix cis from the Latin word for on this side. ... 

The prefix trans tells us that the triphenylphosphine groups occupy opposite corners of a square rather than adjacent corners (cis). The use of chloro in the name (instead of chloride ) implies the absence of discrete chloride ions, as in [Ir(CO)(PPh3)2]+Cr. Names, as opposed to formulae, are easier to index or to store in a data bank for the rapid retrieval of information on compounds having specific structural features. If a chemist wished to collect the available thermodynamic data for inorganic nitrites, a computer search of formulae containing NOz or some multiple thereof would produce a vast number of organic nitro-compounds of no... 

To understand the consequences of this inability to rotate, compare the two possible structures of 2-butene shown in Figure 22-12. The arrangement in which the two methyl groups are on the same side of the molecule is indicated by the prefix cis-. The arrangement in which the two methyl groups are on opposite sides of the molecule is indicated by the prefix trans-. These terms derive from Latin cis means on the same side, and trans means across from. Because the double-bonded carbons cannot rotate, the cis- form caimot easily change into the trans- form. 

The prefix trans- means across or on the other side of. As a reminder of this terminology, think of words snch as transatlantic. ... 

Transferases. Transferases catalyze reactions that involve the transfer of groups from one molecule to another. Examples of such groups include amino, carboxyl, carbonyl, methyl, phosphoryl, and acyl (RC=0). Common trivial names for the transferases often include the prefix trans. Examples include the transcarboxylases, transmethylases, and transaminases. 

A endo-5-exo reaction describes a bicyclization with an initial 6-endo and a terminating 5-e.vo ring closure. The prefix trans or cis describes the ring junction and the prefix anti or syn describes the relative stereochemistry of two adjacent carbon centers. 

The product lifecycle of modem products is defined and influenced by subject matter experts of many disciphnes. As explained in Chaps. 4 and 8, it is also the subject of socio-technical considerations. The self-evolving discipline of integration gains a new level of importance as trans-disciplinarity. Trans-disciplinarity covers the deep integration of various forms of research or expertise to create a holistic approach [8]. As the prefix trans indicates, trans-disciplinarity concerns issues that are between the disciplines, across the different disciplines, and beyond each individual disciphne simultaneously. When for instance contrary targets exist, trans-disciplinarily can help determine the most relevant problems and solution approaches. It shares capabilities like interdependence with the network-centric world [2]. 

The prefix trans- means"across"or "on the other side off Words such as "transatlantic" will remind you of this terminology. 

In cis-l,2-dibromoethene both the Br atoms remain fixed on the same side of the C=C double bond. On the other hand, in trans-l,2-dibromoethene, the Br atoms are positioned across the C=C double bond. (Remember that the prefix trans- means across.) These two stereoisomers have different arrangements of the atoms in space so they are different compounds with different physical properties and some different chemical properties, e.g. differing rates for the same reaction. Whenever we have unsaturated compounds with the structures shown in Figure 14.20, we can have this cis-trans type of isomerism. 

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