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Topic: Functional group


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In the News (Mon 18 Dec 17)

  
  Group - Wikipedia, the free encyclopedia
Group of galaxies, a small number of galaxies near each other; a special case is the Local Group, containing the Milky Way Galaxy
Group (sociology), a sub-set of a culture or of a society
Functional group, a functional entity consisting of certain atoms whose presence provides a certain property to a molecule.
en.wikipedia.org /wiki/Group   (204 words)

  
 Functional Group Editor
This is a measure of the accumulation of degrees of the average temperature in excess of the base temperature of the functional group at which time the functional group reaches maturity.
This is a measure of the accumulation of degrees of the average temperature in excess of the base temperature of the functional group after maturity when the functional group dies.
During functional group editing, many aspects of the factors affecting growth can be viewed, and each will provide a popup graph of that aspect.
cnrit.tamu.edu /rsg/phygrow/pc/fgedit.html   (625 words)

  
 31
functional group - a specific arrangement of atoms in an organic compound that is capable of characteristic chemical reactions.
There are many more: Here is a list of some additional functional groups, you should know the functional group characteristic of each type of organic compound and be able to recognize by the name of an organic compound (just look at the ending suffix) what group it belongs to.
Again, remember, functional groups play a major role in determining the physical and especially the chemical properties of organic molecules.
darkwing.uoregon.edu /~ch111/L31.htm   (423 words)

  
 Higher Education::Functional Group Chemistry
Functional Group Chemistry presents the chemistry of functional groups with an emphasis on patterns of reactivity, the consequences of the relative electronegativity of the atoms that constitute functional groups, the role of lone pairs and the stereochemistry of reactions at a particular group.
It is concerned with the interactions between an aromatic ring and functional groups that are attached to it, such as their effect on the orientation of aromatic substitution.
Students are encouraged to consider the reactivity of functional groups in terms of their regions of electron deficiency and excess, and hence to identify the sites at which nucleophiles and electrophiles might react.
he-cda.wiley.com /WileyCDA/HigherEdTitle/productCd-0471224804.html   (214 words)

  
 [No title]   (Site not responding. Last check: 2007-11-06)
Alternatively, and in a most preferred reaction scheme, a carbamate functional intermediate adduct (A') may be made from the reaction of a polyisocyanate (ai) and a carbamate functional compound (aii) comprising at least one group which is reactive with isocyanate.
The cationic salting group of the ethylenically unsaturated monomer may be a primary, secondary, or tertiary amine functional group, or a quaternary ammonium salt, or a mixture thereof.
Curing agent (C) is a compound having a plurality of functional groups that are reactive with the carbamate groups on component (A).
www.wipo.int /cgi-pct/guest/getbykey5?KEY=01/44383.010621&ELEMENT_SET=DECL   (5937 words)

  
 BioChem
The hydroxyl functional group is definitely polar due to the high Electronegativity of Oxygen.
The Carboxyl functional group is acidic and molecules with that functional group are sometimes called Carboxylic Acids.
The Phosphate functional group is polar and mildly acidic.
bioweb.wku.edu /courses/Biol115/Wyatt/Biochem/Biochem1.htm   (588 words)

  
 Functional group geometry   (Site not responding. Last check: 2007-11-06)
The center of the ether functional group is the oxygen.
The center of the amine functional group is the nitrogen.
The center of the amide functional group is the carbon double bond oxygen and the nitrogen.
www.elmhurst.edu /~chm/vchembook/522funcgpC.html   (749 words)

  
 Functional Groups   (Site not responding. Last check: 2007-11-06)
Chemists often refer to parts of a molecule that contain only carbon and hydrogen as alkyl groups and other parts of a molecule that contain other types of atoms as functional groups.
The term functional group stems from the fact that these parts of the molecule are often the reactive parts of the molecule.
For each of the other functional groups we drop the e from ane, ene, or yne and add a different ending as shown in the table below.
people.depauw.edu /jhansen/Chem120S04/FunctionalGroups.html   (311 words)

  
 Nomenclature
If the functional groups are attached to carbon atoms on the ring which have one carbon between them, then they are referred to as being meta to one another.
When the two functional groups are on opposite ends of the ring of carbon atoms, they are referred to as being para to one another, and the third compound here can be referred to as para-dichlorobenzene.
Notice that there are three nitro groups attached; and since it is the nitrogen atom that is attached to the ring, the NO group in the upper left corner is written in the opposite direction just to emphasize that it is the nitrogen atom that is attached to the ring.
dl.clackamas.cc.or.us /ch106-02/nomencla3.htm   (721 words)

  
 [No title]   (Site not responding. Last check: 2007-11-06)
Heretofore, no convenient method for preparing such monomers with free carboxyl acid groups and carboxyl functional groups has been known or suggested and indirect procedures would generally have to be used for their preparation.
Organosiloxane compounds and oligomers as claimed in claim 10, wherein the M groups attached to the terminal Si atoms are Rla or R1 groups or mixtures of the same.
groups or mixtures of the same; x is from 0 to 3; at an elevated temperature in the presence of a noble metal catalyst for a time sufficient to react the hydride groups on the silicone atom with an olefinic group on the pyrrolidone.
www.wipo.int /cgi-pct/guest/getbykey5?KEY=98/22478.980528&ELEMENT_SET=DECL   (5381 words)

  
 Railway Track and Structures: New maintenance functional group. (AREMA News).... @ HighBeam Research
As I mentioned in the September issue of RT&S, throughout the course of the next year we will have each of the AREMA functional group vice presidents provide insights and updates for their respective groups.
The intent of this new functional group is to add value for the maintenance professional and the railroads that they work for.
Because this is a newly-formed group, the focus of this update will be on the objectives of the functional group and the plans for design, development and implementation of the group.
www.highbeam.com /library/doc0.asp?DOCID=1G1:80743516&refid=ip_encyclopedia_hf   (815 words)

  
 functional group. The Columbia Encyclopedia, Sixth Edition. 2001-05
in organic chemistry, group of atoms within a molecule that is responsible for certain properties of the molecule and reactions in which it takes part.
Organic compounds are frequently classified according to the functional group or groups they contain.
For example, methanol, ethanol, and isopropanol are all classified as alcohols since each contains a functional hydroxyl group.
www.bartleby.com /65/fu/functiongp.html   (111 words)

  
 FunctionalGroups
Since the chemical reactivity of a given functional group is generally independent of the rest of the structure of which it is a part, functional groups simplify the task of understanding chemical reactivity.
As before, R stands for that portion of the structure that is not part of the functional group.
The substituents attached to the carbon atom of the carbonyl group determine whether a functional group is an aldehyde, ketone, carboxylic acid, ester, or amide.
www.usm.maine.edu /~newton/Chy251_253/Lectures/FunctionalGroups/FunctionalGroups.html   (636 words)

  
 The Multi Group
The research in the Multi Group mainly revolves around functional programming, and programming languages in general.
The functional programming research is mainly centered around the programming language Haskell.
The current activities within the functional programming group range from category theory and other theory, applications of functional programming, to low level implementation techniques.
www.cs.chalmers.se /ComputingScience/Research/Functional   (224 words)

  
 Nomenclature Examples
Note that if the methyl group were located at the end of the chain, the longest chain would have seven carbons and the root name would be heptane not hexane.
An introduction to functional group nomenclature was limited to carbon-carbon double and triple bonds, as well as simple halogen groups.
Note that only one functional group suffix, other than "ene" and "yne", may be used in a given name.
www.cem.msu.edu /~reusch/VirtualText/nomexmp1.htm   (1823 words)

  
 [No title]   (Site not responding. Last check: 2007-11-06)
Nor shall a Functional Acknowledgment be sent to report errors in a previous Functional Acknowledgment.} {\fs20 \par}{\fs20 \tab}{\fs20 The Functional Group Header Segment (GS) is used to start the envelope for the Functional Acknowledgment Transaction Sets.
There shall be one AK1 segment for the functional group that is being acknowledged.} {\fs20 \par}{\fs20\b 3.} {\fs20 \tab}{\fs20 AK2 is used to start the acknowledgement of a transaction set within the received functional group.
Use to identify the unique identification number of the functional group in which the transaction set(s) being acknowledged was received.} {\fs20\b\i \par}{\fs20\b\i \par}{\fs20\b\i 2.
fedebiz.disa.mil /FILE/IC/FED/4010/997/41f997_a.rtf   (417 words)

  
 functional group --¬† Britannica Concise Encyclopedia¬†- The online encyclopedia you can trust!
In molecules, any of numerous combinations of atoms that undergo characteristic chemical reactions themselves and in many cases influence the reactivity of the rest of the molecule.
In organic chemistry the concept of functional groups is useful as a basis for classification of large numbers of compounds according to their reactions.
The group is a constituent of carboxylic acids, esters, anhydrides, acyl halides, amides, and quinones, and it is the characteristic functional group (reactive group) of aldehydes and ketones.
www.britannica.com /ebc/article-9365061   (838 words)

  
 Hydrocarbons
Hydrocarbon derivatives are formed when there is a substitution of a functional group at one or more of these positions.
An almost unlimited number of carbon compounds can be formed by the addition of a functional group to a hydrocarbon.
A functional group is a reactive portion of a molecule; particular types of reactions are associated with the functional groups described below.
hyperphysics.phy-astr.gsu.edu /hbase/organic/hydrocarbon.html   (86 words)

  
 Organic Nomenclature - Functional Group Names   (Site not responding. Last check: 2007-11-06)
The structures, properties, and chemical reactions of organic and biochemicals are determined by the functional groups present.
Functional groups are defined as specific groupings of atoms or bonds which are part of a larger hydrocarbon chain.
It is necessary that you are able to recognize these groups by structure and by name.
www.elmhurst.edu /~chm/vchembook/522funcgp.html   (201 words)

  
 McMaster Chemistry: Bader   (Site not responding. Last check: 2007-11-06)
The theory recovers the central operational concepts of the molecular structure hypothesis, that of a functional grouping of atoms with an additive and characteristic set of properties, together with a definition of the bonds that link the atoms and impart the structure.
This group can be linked to other such peptide units in a theoretical synthesis of a polypeptide or any portion of it.
Each group has a zero net charge and a set of transferable properties that make additive contributions to the corresponding properties of the total system; to its energy, volume, electrostatic field and polarizability, for example.
www.chemistry.mcmaster.ca /bader   (780 words)

  
 functional group
functional group, in organic chemistry, group of atoms within a molecule that is responsible for certain properties of the molecule and reactions in which it takes part.
formyl group - formyl group, in chemistry, functional group that consists of a carbonyl group joined by a single...
BIODIVERSITY, DENSITY COMPENSATION, AND THE DYNAMICS OF POPULATIONS AND FUNCTIONAL GROUPS.
www.infoplease.com /ce6/sci/A0819880.html   (265 words)

  
 Carbon-based Compounds
There are certain groups of atoms that are frequently attached to the organic molecules we will be studying, and these are called functional groups.
These groups tend to act the same and have similar properties no matter where on a carbon backbone molecule they’re stuck.
We will be discussing each of these functional groups in more detail as we discuss the various types of molecules that contain them.
biology.clc.uc.edu /courses/bio104/carbon.htm   (684 words)

  
 Chapter 25, Section 4   (Site not responding. Last check: 2007-11-06)
Each distinct kind of functional group undergoes the same kinds of reactions in every molecule, regardless of the size and complexity of the molecule.
C triple bonds, there are also many functional groups that contain elements other than just C and H. Many of the functional groups contain other nonmetals such as O and N. We can think of organic molecules as being composed of functional groups that are bonded to one or more alkyl groups.
Where necessary, the location of the OH group is designated by an appropriate numeral prefix that indicates the number of the carbon atom bearing the OH group, as shown in the examples in Figure 25.11.
cwx.prenhall.com /bookbind/pubbooks/blb/chapter25/medialib/blb2504.html   (988 words)

  
 functional group on Encyclopedia.com
FUNCTIONAL GROUP [functional group] in organic chemistry, group of atoms within a molecule that is responsible for certain properties of the molecule and reactions in which it takes part.
The accompanying table shows important functional groups and the classes of compounds in which they occur.
Impact of functional group distribution on the adsorption of a polymeric dispersant.
www.encyclopedia.com /html/f1/functiongp.asp   (299 words)

  
 !Functional Materials Incorporated   (Site not responding. Last check: 2007-11-06)
Functional Materials Inc. is devoted to developing and marketing specialty color effects and materials for use in merchandising consumer products.
Functional Materials Inc. is asociated with FM Group Inc., which is responsible for the manufacture of the products.
Since 1985 Functional Materials' proprietary colorant technology has been used to help develop the brand identity for major consumer credit cards industry, including the Gold and Platinum programs for Visa, Mastercard / Europay, American Express, Citibank and other major national and international card issuers.
www.functionalmaterials.com   (110 words)

  
 Organic Functional Groups and Homologous Series: A summary for GCE AS-A2 or US K12 subsiduary advanced level at Doc ...
A functional group is an atom or combination of atoms which gives an organic molecule its distinctive and characteristic chemistry.
A homologous series is a group of molecules with the same general formula and the same functional group.
If there is a 'higher ranking' functional group in the molecule the substituent OH is called by the prefix 'hydroxy' see * examples.
www.wpbschoolhouse.btinternet.co.uk /page06/FunctionalGroups.htm   (893 words)

  
 JCE 1999 (76) 56 [Jan] Functional Group Analysis
Many non-major students of introductory organic chemistry experience difficulties when first confronted with the classical questions of distinguishing between organic compounds containing different functional groups using basic chemical reactions and explanations of their visual observations.
Initial questions where all results and observations of the chemical tests relating to the selected functional groups are systematically tabulated help to develop a methodical approach to analyzing these problems.
This method of tabulating the results of chemical tests as an aid to recognizing and comparing compounds with more than one functional group is also of value to the student when analyzing more complex organic and bioorganic compounds later in the course.
jchemed.chem.wisc.edu:8000 /hs/Journal/Issues/1999/Jan/abs56.html   (353 words)

  
 Chemistry : Chapter 12 : Identifying Functional Groups   (Site not responding. Last check: 2007-11-06)
Knowing the types of functional groups is basic to an understanding of organic chemistry.
A list of functional groups is shown in Table I. In this table, R represents a group of carbons and hydrogens not relevant to the functional group.
In addition to the hemiacetal, there are two more alcohol groups, one with the CH and the other on the bottom left.
www.wwnorton.com /chemistry/concepts/chapter12/ch12_3.htm   (381 words)

  
 The Journal of Coatings Technology: Impact of functional group distribution on the adsorption of a polymeric ...   (Site not responding. Last check: 2007-11-06)
Binder polymers functionalized with a small amount of polar groups satisfy both the dispersion quality of paints and the mechanical strength of coating films.
For industrial-grade polydisperse dispersant polymers, functional groups are not evenly distributed among the polymer chains.
The functional group distribution in polyurethane dispersant polymers was investigated by statistical estimation and an adsorption experiment.
www.highbeam.com /library/doc0.asp?DOCID=1G1:99431165&refid=holomed_1   (220 words)

  
 Functional Polymers Group @ CASE   (Site not responding. Last check: 2007-11-06)
We develop and study new functional polymer systems, in particular materials with advanced optic and electronic properties
Christoph Weder is interested in the design, synthesis, processing, exploration, and exploitation of new functional polymers, in particular new and novel materials with advanced optic and electronic properties.
Our research is conducted in a project-oriented, collaborative fashion, and our group is the home of students and scientists with backgrounds in a broad range of disciplines.
macromolecules.case.edu   (133 words)

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