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Topic: Complex (chemistry)


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  AllRefer.com - complex ion (Chemistry) - Encyclopedia
Many complex ions, however, such as tetrammine zinc (II), Zn(NH, are only loosely aggregated and tend to dissociate in a water solution until an equilibrium is established between the complex ion and its components (see chemical equilibrium).
Such complex ions, or coordinated complexes as they are also called, generally consist of a positively charged central metal atom or ion, like the zinc in tetramine zinc, surrounded by electron-donating, or basic, groups called ligands; in the tetrammine zinc complex, the NH groups are the ligands.
Many complex ions are colored; the specific color of a complex depends on both the central atom or ion and the ligands.
reference.allrefer.com /encyclopedia/C/complexi.html   (506 words)

  
 ScienceDaily: Chemistry
Chemistry is the science that deals with the properties of organic and inorganic substances and their interactions with other organic and inorganic substances.
Organic chemistry -- Organic chemistry is the scientific study of the structure, properties, composition, reactions, and synthesis of organic compounds that by definition contain carbon.
Chemistry -- Chemistry is the science that deals with the properties of organic and inorganic substances and their interactions with other organic and inorganic substances.
www.sciencedaily.com /encyclopedia/chemistry   (1391 words)

  
 Complex (chemistry) Summary
The study of "coordination chemistry" is the study of "inorganic chemistry" of all alkali and alkaline earth metals, transition metals, lanthanides, actinides, and metalloids.
Typically the chemistry of complexes is dominated by interactions between s and p molecular orbitals of the ligands and the d (or f) orbitals of the metal ions.
A typical example of a receptor-ligand complex is a neurotransmitter bound to a neurotransmitter receptor in the cell membrane of the synapse.
www.bookrags.com /Complex_(chemistry)   (3257 words)

  
 Penn Department of Chemistry - Research Areas   (Site not responding. Last check: 2007-10-10)
In the Penn Chemistry Department a broad range of biological problems are being attacked, from the structure of proteins and nucleic acids, to enzyme mechanisms, to neurochemistry.
Theoretical chemistry is particularly strong in the areas of statistical mechanics, quantum dynamics, and molecular dynamics, with emphasis on the theory and computer simulation of biophysical systems, novel materials and condensed phase processes.
The Penn Chemistry department is a leader in creating ideas which will benefit society: improved automotive pollution catalysts and heterogeneous synthesis catalysts, a new understanding of protein secondary and tertiary structure, control of photosynthetic and ion channel biopathways, and new coatings to inhibit corrosion.
www.sas.upenn.edu /chem/edu/phd_researchareas.html   (1445 words)

  
 Complex ions menu   (Site not responding. Last check: 2007-10-10)
An introduction to complex ions with an explanation of what ligands are and how they bond to the central metal ion.
A simple explanation of why complex ions formed by transition metals tend to be coloured, and a look at the factors which cause the colours to change during reactions.
Looks at the chemistry of several simple ligand exchange reactions required for UK A' level courses.
www.chemguide.co.uk /inorganic/complexmenu.html   (203 words)

  
 default   (Site not responding. Last check: 2007-10-10)
Textile chemistry can generally be divided into three major areas: dyeing and finishing chemistry, fiber and polymer chemistry, and a newer area that intersects with materials science and involves the blending of textile materials.
Chemistry is important in all functions, but the technical content tends to be more challenging in the polymer chemistry side than in the dyeing and finishing end.
Because textile chemistry encompasses many related disciplines, it is important that students gain a broad perspective of the field by maintaining a varied course of study.
www.chemistry.org /portal/a/c/s/1/acsdisplay.html?DOC=vc2\3wk\wk3_text.html   (1165 words)

  
 Organic chemistry Summary
In addition, the chemistry of a compound is strongly affected by whether it is a straight-chain molecule or a ring compound, and whether that ring is aliphatic or aromatic.
Organic chemistry received a boost when it was realized that these compounds could be treated in ways similar to inorganic compounds and could be manufactured by means other than 'vital force'.
Biochemistry, the chemistry of living organisms, their structure and interactions in vitro and inside living systems, has only started in the 20th century, opening up a brand new chapter of organic chemistry with enormous scope.
www.bookrags.com /Organic_chemistry   (4377 words)

  
 Chemistry at BU - Inorganic Chemistry
Research in Inorganic Chemistry spans the continuum from small molecule systems to metalloproteins, from the investigation of the reactivity properties of synthetic complexes to the use of metal-based reagents for probing protein-DNA interactions.
Protein film voltammetry (PFV) is used in the Elliott lab as a way to explore the electron transfer pathways and redox-dependent catalytic chemistry of complex metalloproteins such as sulfite reductase and multicopper oxidases.
Chemistry of selected main group elements; aspects of coordination chemistry, including stereochemistry, stability of complexes, bonding, electronic spectra, magnetic properties, kinetics and mechanisms of substitution, rearrangement and redox reactions; chemistry of selected transition elements.
www.bu.edu /chemistry/faculty/researchareas/inorganic.html   (514 words)

  
 C&EN: SCIENCE & TECHNOLOGY - INTERSTELLAR CHEMISTRY
If chemistry is the science of molecular transformations, it's fair to say that chemistry begins in these cold, dark regions between the stars.
The dustier regions are also the coldest and the darkest, because the dust particles absorb starlight in the visible and ultraviolet spectral regions and re-emit it in the infrared as heat.
The fact that some molecules may stick to the grains and some don't affects the chemistry; it affects the level of ionization, and that affects the amount of magnetic support there is to the gas.
physics.syr.edu /research/surface_physics/cne_astrochemistry.htm   (4217 words)

  
 Graduate Courses - Chemistry Department - University of Chicago
These concepts are used in surveying the chemistry of inorganic compounds from the standpoint of quantum chemistry, chemical bonding principles, and the relationship between stucture and reactivity.
The descriptive chemistries of the main-group elements and the transition metals are surveyed from a synthetic perspective, and reaction chemistry of inorganic molecules is systematically developed.
Key underlying concepts from organometallic chemistry and polymer science are introduced as appropriate, and the properties and applications of important polymers produced by metal catalysis are discussed.
chemistry.uchicago.edu /gradcourses.shtml   (1015 words)

  
 The Chemistry of Life   (Site not responding. Last check: 2007-10-10)
The chemistry of life processes is so complex that no single person can master any but a small segment of the science, and even so each specialist would admit that his or her knowledge of their specialty is far from complete.
What biochemists and geneticists are trying to unravel is the complex chemistry that is the result of billions of years of random changes to the firmware (software that is hardwired) of life.
In contrast, the chemistry involved is extremely complex, since it reflects the myriad changes that occurred over several billion years.
www.xmission.com /~pba/life.htm   (2476 words)

  
 Complex (chemistry)   (Site not responding. Last check: 2007-10-10)
A complex in chemistry is a reversible association of molecules, atoms, or ions through weak non-covalent chemical bonds.
A metal complex, also known as coordination compound, is a structure composed of a central metal atom or ion, generally a cation, surrounded by a number of negatively charged ions or neutral molecules possessing lone pairs.
Typically, the chemistry of complexes is dominated by interactions between s and p orbitals of the ligands and the d (or f) orbitals of the metal ions.
www.pillscatalog.net /Complex_(chemistry).html   (900 words)

  
 Chemistry at BU - Biophysical Chemistry
Research in the Biophysical Chemistry explores the connections between physical chemistry and the chemical function of biological molecules.
The major goal in these research projects is to elucidate the underlying fundamental chemistry and engineering principles and to use that insight to direct our creative and scientific efforts.
One objective of the research is to gain better understanding of the properties and mode of operations of enzymes and complex molecular machines that govern fundamental life processes.
www.bu.edu /chemistry/faculty/researchareas/biophysical.html   (707 words)

  
 MIT Chemistry: Archived News
To understand these fascinating and complex enzymes, Chemistry Department Professors Cathy Drennan, Bob Griffin, Dan Nocera, and JoAnne Stubbe are applying techniques as diverse as x-ray diffraction, electron paramagnetic spectroscopy, and yeast genetics.
His research interest is complex natural product synthesis in concert with the discovery and the development of new reactions for organic synthesis.
Sarah O'Connor received her B.S. in chemistry from the University of Chicago in 1995 and her Ph.D. from MIT with Barbara Imperiali in 2001.
web.mit.edu /chemistry/www/news/2003_04.html   (560 words)

  
 [No title]   (Site not responding. Last check: 2007-10-10)
Over the past several decades, it has become clearer that the principles of molecular science are essential to understanding the structure and function of the various components of the environment and their interactions.
As chemists proceed to redesign the chemistry curriculum for the future, I hope they will keep in mind that environmental science is another important field of applied chemistry, and it deserves to be an integral part of the chemistry curriculum.
The fact is, most environmental scientists do not major in chemistry and we need to grab these young people early and show them how important chemistry is and will be in their future professional life.
www.chemistry.org /portal/a/ContentMgmtService/resources?id=c373e9f664241b208f6a4fd8fe800100   (1198 words)

  
 complexnomenclature
Complex ions are ions that are made up of a single central metal atom or ion.
The ligands and the central metal atom or ion are connected with dative bond.
To name any complex ion, list first the ligands, then the central atom.
www.geocities.com /nsmlink/complexnomenclature.htm   (269 words)

  
 Chemistry & Complexity 3
Later we learn to understand the physics and chemistry of gas, liquid and solid phases in terms of kinetic theory, thermodynamics and solution theory, as discussed in the section on linear chemistry here, and solid structure in terms of bonding theory, here and here.
Finding a synthetic route – a series of synthetic ladders – in reaction chemistry space that avoids all of the anti-synthetic snakes is very difficult, and in the 20th century target synthesis represented the pinnacle of chemical science.
Chemistry is – and will remain – an experimental science because predictions can seldom be made from first principles.
www.meta-synthesis.com /webbook/24_complexity/complexity3.html   (7913 words)

  
 Logical structure of the fundamentals of chemistry, conceptual schemes of its geometrization and spatial mathematical ...
As a result: (i) the problem of the geometrization of the language of chemistry is solved on a conceptual level; (ii) it is shown that it is possible to translate the structure of chemical notions and relations in entirely mathematical language.
The notion species of complex chemical objects means the set of all complex chemical objects of equal chemical composition, chemical construction and of equivalent energy states.
The central notion for the fourth part of the fundamentals of chemistry is the complex chemical process.
www.acadjournal.com /2000/v2/part2/p3   (5379 words)

  
 ChBE @Rice - Research
"Beyond the Molecular Frontier: Challenges for Chemistry and Chemical Engineering" is a report published in 2003 by the National Research Council that brings together research, discovery, and invention across the entire spectrum of the chemical sciences: from fundamental, molecular-level chemistry to large-scale chemical processing technology.
Explaining the processes of life in chemical terms is one of the great challenges continuing into the future, and the chemistry behind thought and memory is an especially exciting challenge.
Great progress has been made in developing Green Chemistry, but more is needed as we continue to meet human needs with the production of important chemical products using processes that are completely harmless to the earth and its inhabitants.
www.ruf.rice.edu /~che/research/grand_challenges.html   (1091 words)

  
 Chemistry 30AL (UCLA)
Chemistry 30AL is the second laboratory course in the 20/30 series that is designed specifically for the physical science and engineering majors.
Students in the chemistry 20/30series sequence are mainly gear toward entering graduate school for further research.
Chemistry 30AL, 30BL and 30CL are focused on organic chemistry.
www.chem.ucla.edu /~gchemlab/30al_web.htm   (224 words)

  
 Chemistry Course Descriptions
Study of how compounds are formed and named; chemical equations; calculations and problem-solving involving elements, compounds and chemical equations including stoichiometry, thermochemistry; properties of gases, solids, solutions and acids and bases.
Continuation of Chemistry I. Includes study of chemical equilibria, acid-base chemistry, complex ions, thermodynamics, oxidation-reduction reactions, and introduction to organic chemistry.
Continuation of study of structure, nomenclature, properties, synthesis and reactions of aliphatic and aromatic carbon compounds with emphasis on chemistry of carbonyl compounds.
www.stchas.edu /coursedesc/chemistry.shtml   (189 words)

  
 C&EN: Editor's Page - Cyber-Enabled Chemistry
Examples included the design of drugs, catalysts, and functional materials; the influence of complex environments on chemical reactions; the rules for self-assembly; the chemistry of electronically excited states; and the complex chemistry of Earth.
Participants spoke eloquently of the potential for cyber-enabled chemistry to provide an "unbounded chemical sciences landscape in which different disciplines, computational and experimental methods, institutions, geographical areas, levels of user sophistication and specialization, and subdisciplines within chemistry are bridged" by CI tools.
Cyber-enabled chemistry is intrinsically a broader impact of the basic research and education that we support, and it adds considerable value to this investment.
pubs.acs.org /cen/editor/83/8311edit.html   (607 words)

  
 Complex Chemistry in Air Quality Models, Exposure Research, US EPA
The atmospheric chemistry of ozone involves the complex interactions of thousands of different chemical reactions, and describing the chemistry of other important pollutants, like secondary organic particulate matter and secondary toxic chemicals, requires even more reactions.
Including this level of detailed chemistry in a current air quality model would overwhelm even the most powerful computers available; therefore, the chemistry in current models is always extremely simplified.
For pollutants which cannot be represented by current mechanisms due to their complexity, such as secondary organic particulate matter, researchers will finally be able to develop chemical mechanisms and incorporate them in air quality models.
epa.gov /nerl/research/2001/g1-2.html   (870 words)

  
 Georgia Tech :: Chemistry & Biochemistry :: Faculty :: Paul H. Wine
Atmospheric chemists attempt to understand the chemical composition of the natural atmosphere, the nature of interactions involving atmospheric gases, liquids, and solids, as well as the Earth surface and biosphere, and the ways that human activity affects the chemical and physical characteristics of the atmosphere.
The atmospheric chemistry of ozone is complex, involving numerous catalytic chain reactions.
Understanding this complex chemistry is another focus of our research effort.
www.chemistry.gatech.edu /faculty/Wine   (1072 words)

  
 Mike Pilling, School of Chemistry, University of Leeds
Experimental measurements of the rates of elementary reactions are made using laser flash photolysis, coupled with a range of laser based techniques to probe the behaviour of short lived species in the gas phase.
Current experiments relate to the chemistry of carbon and sulphur containing radicals for combustion applications, and OH and peroxy radicals for atmospheric chemistry.
We also develop models of complex chemistry and apply them to help us to understand atmospheric field experiments and measurements that we conduct in a large atmospheric reactor in Spain.
www.chem.leeds.ac.uk /People/Pilling.html   (363 words)

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