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Topic: Complex ion

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	complex ion - Encyclopedia.com
		complex ion charged molecular aggregate (see ion), consisting of a metallic atom or ion to which is attached one or more electron-donating molecules.
		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.
		Complex dielectric permittivity of an ion-containing polymer in the microwave region.
	www.encyclopedia.com /doc/1E1-complexi.html (1415 words)

	NationMaster - Encyclopedia: Complex ion
		In chemistry, a complex 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.
		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.
	www.nationmaster.com /encyclopedia/Complex-ion (724 words)

	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)

	complex ion. The Columbia Encyclopedia, Sixth Edition. 2001-05
		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.
		Because ligands remain in a fixed position around a central atom or ion, in many complexes different isomers, or arrangements, of the ligand groups are possible.
		Many complex ions are colored; the specific color of a complex depends on both the central atom or ion and the ligands.
	www.bartleby.com /65/co/complexi.html (456 words)

	ion - Encyclopedia.com
		A simple ion consists of only one charged atom; a complex ion consists of an aggregate of atoms with a net charge.
		Since ordinary matter is electrically neutral, ions normally exist as groups of cations and anions such that the sum total of positive and negative charges is zero.
		Although an ion engine does not develop enough thrust to launch a rocket into earth orbit, it is considered practical for propelling one through interplanetary space on long-distance trips, e.g., between the earth and Jupiter.
	www.encyclopedia.com /doc/1E1-ion.html (1699 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal
		A complex in chemistry usually is used to describe molecules or ensembles formed by the combination of ligands and metal ions.
		Ligands are generally bound to a metal ion by a coordinate covalent bond (donating electrons from a lone electron pair into an empty metal orbital), and are thus said to be coordinated to the ion.
		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.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=complex_ion (2103 words)

	COMPLEX IONS AND THE SPECTROCHEMICAL SERIES
		In water solutions, transition metal ions are usually not found as single ions but as complex ions in which the metal ion is bonded to 2, 4, or 6 water molecules with coordinate covalent bonds.
		Often the color of the new complex ion is different from the original color of the metal ion in water.
		E for a given complex and therefore the color of the complex is determined by the following: which ligand is used; which metal is used and the oxidation state of the metal.
	www.woodrow.org /teachers/chemistry/institutes/1986/exp35.html (980 words)

	Complex (chemistry) Summary
		Complex ions are ions that have a molecular structure consisting of a central atom bonded to other atoms by coordinate covalent bonds.
		The metal atom in the complex ion is referred to as the central atom.
		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)

	Complex - Search Results - ninemsn Encarta
		Complex, ion or molecule consisting of a central transition metal ion or atom to which a number of negative ions (or electron-rich molecules) called...
		Complex Number, an expression of the form a + bi where a and b are real numbers and i is the square root of minus one.
		Oedipus Complex, in psychoanalysis, a son’s unconscious sexual desire for his mother, accompanied by an intense feeling of rivalry with the father...
	au.encarta.msn.com /Complex.html (169 words)

	S-Cool! - AS & A2 Level Chemistry Revision - Quicklearn
		Complexes are atoms or more ions or compounds in which an ion is surrounded by a number of molecules or oppositely charged ions called
		Ammonia: the co-ordinate bond is formed between the nitrogen atom and the metal ion, the nitrogen atom donating the lone pair of electrons.
		The Cyanide ion: the lone pair of carbon atoms is used to form co-ordinate bonds.
	www.s-cool.co.uk /topic_quicklearn.asp?loc=ql&topic_id=14&quicklearn_id=7&subject_id=7&ebt=160&ebn=&ebs=&ebl=&elc=13 (289 words)

	COORDINATION CHEMISTRY
		Complex formation is a fundamental chemical process in natural waters - complexes modify metal species in solution, reducing activity of free ion, changing solubility, mobility, and toxicity.
		Within these groups of metal ions complex stability is proportional to the charge of the metal ion - alkali metals are the weakest, and only complex with water, while transition metals complex with a variety of ligands.
		Complexes containing 5 and 6 membered rings are the most stable, while four or 7+ membered rings are less stable.
	www.geo.utexas.edu /courses/376m/coord_chem.htm (1313 words)

	complex ions - colour
		Complex ions containing transition metals are usually coloured, whereas the similar ions from non-transition metals aren't.
		Suppose that the energy gap in the d orbitals of the complex ion corresponded to the energy of yellow light.
		The 2+ ion is almost the same colour as the hexaaquacopper(II) ion, and the 3+ ion is the hard-to-describe violet-blue-gey colour.
	www.chemguide.co.uk /inorganic/complexions/colour.html (2345 words)

	Marianny Yajaira Combariza
		The kinetics and thermodynamics of ion-molecule reactions of divalent transition metal complex ions, in the gas-phase, are strongly affected by the coordination structure around the metal.
		In addition, calculations show that the reactivities of the Mn, Fe, and Co complexes are consistent with slightly distorted tetrahedral structures, and the reactivities of the Cu complexes indicate that the complexes of this metal are close to square planar.
		Ion-molecule reactions of metal complex ions with acetonitrile in a quadrupole ion trap mass spectrometer are shown to have some potential for determining the number and types of functional groups bound to a metal.
	www.chem.umass.edu /~vachet/marianny_yajaira_combariza.htm (996 words)

	introducing complex ions - ligands and bonding
		To bond the four chloride ions as ligands, the empty 4s and 4p orbitals are used (in a hybridised form) to accept a lone pair of electrons from each chloride ion.
		This is the complex ion formed by attaching 3 ethanedioate (oxalate) ions to a chromium(III) ion.
		Overall, the complex ion has a co-ordination number of 6 because the central metal ion is forming 6 co-ordinate bonds.
	www.chemguide.co.uk /inorganic/complexions/whatis.html (2201 words)

	Formation Constant (Site not responding. Last check: )
		The absorption spectrum of this complex ion in 0.05M ammonia is shown in Figure 1 (line B).
		The tetraamminecopper complex is practically the only copper species present under the conditions of this experiment: an ammonia-ammonium chloride buffer with a 0.05M concentration of ammonia.
		Determine the concentration of the tetraaminecopper(II) complex ion from the colorimeter calibration graph.
	www.silcom.com /~adbrown/chem102/formation_constant.htm (1927 words)

	complexnomenclature
		The bond between the metal ion and the ligand, where the ligand supplies both electrons, is known as a
		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.
	www.geocities.com /nsmlink/complexnomenclature.htm (269 words)

	Common Ions and Complex Ions
		Essentially all of the silver is present as the Ag ion at very low concentrations of NH As the NH concentration increases, the dominant species soon becomes the two-coordinate Ag(NH ion.
		Either the NH concentration is so small that most of the silver is present as the Ag ion or it is large enough that essentially all of the silver is present as the two-coordinate Ag(NH complex ion.
		Complex ions can also be described in terms of complex dissociation equilibria.
	chemed.chem.purdue.edu /genchem/topicreview/bp/ch18/complex.php (3280 words)

	Complex Ions and Coordination Compounds
		Higher charged ions or higher oxidation states are formed formally by subsequently losing unpaired (n-1) d-electrons.
		In the formation of complexes, differing numbers of ligands (coordination numbers) can associate with a central transition metal ion, and the resulting complexes can assume any of several possible geometric configurations.
		Using your model and the drawing for the square planar complex of dimethylglyoxime and Ni show the shape of this complex.
	www.sonoma.edu /users/b/brooks/115b/complex.html (1364 words)

	[No title]
		Introduction: A complex ion is formed when a metal ion forms coordinate covalent bonds with Lewis bases, which are referred to as ligands.
		Transition metals have a particularly strong tendency to form complex ions, but complex ion formation is by no means restricted to these metals.
		Complex ions and coordination compounds are of great importance in analytical chemistry, industrial chemistry, and biochemistry.
	www.runet.edu /~chem-web/Chemistry/Academics/General_Chemistry/102_EXP11.doc (1460 words)

	Ch110_Lec 5_5 Sept
		Complex ions consist of metal ions surrounded by ligands.
		Note that for all of these metal ions the hydrated (aquo) ion is also a complex ion with water as the ligand.
		The number of ligands around a complex ion is referred to as the coordination number.
	www.humboldt.edu /~rap1/C110.F03/C110Notes/C110_lec05.htm (400 words)

	Coordination Complexes
		Thus heme, the oxygen-carrying component of red blood cells (and the source of the red color) is basically a complex of iron, and the part of chlorophyll that converts sunlight into chemical energy within green plants is a magnesium complex.
		Because the six ligands are located at the corners of an octahedron centered around the metal ion, these electron pairs are equivalent to clouds of negative charge that are directed from near the central ion out toward the corners of the octahedron.
		In contrast to this, the cyanide ion acts as a strong-field ligand; the d orbital splitting is so great that it is energetically more favorable for the electrons to pair up in the lower group of d orbitals rather than to enter the upper group with unpaired spins.
	www.chem1.com /acad/webtext/chembond/cb09.html (2558 words)

	General Chemistry Online: Glossary: Introduction to inorganic chemistry
		The ammonia nitrogen is bound directly to a metal ion in ammines; amines differ in that the ammonia nitrogen is directly bound to a carbon atom.
		complexed to a metal ion will raise the energy of some of its d orbitals and lower the energy of others.
		In inorganic chemistry, a molecule or ion that binds to a metal cation to form a complex.
	antoine.frostburg.edu /chem/senese/101/inorganic/glossary.shtml (438 words)

	Sassy Hair Fashions of Sarasota, FL
		Ions are atoms that have gained or lost an electron and bear a charge of energy.
		Natural negative ion energy is powerful enough to break water molecule clusters into micro-fine particles (atomization) and penetrate the hair shaft.
		The Bio Ionic Ion Dryers are patented hair dryers that utilize Natural Ion Complex technology to deliver millions of natural negative ions to the hair.
	www.sassyhair.com /ionic.html (715 words)

	Columbia Encyclopedia- ion - AOL Research & Learn
		A simple ion consists of only one charged atom; a complex ion consists of an aggregate of atoms with a net charge.
		When a solution is passed through the column, ions from the solution are exchanged with ions on the resin (see chromatography).
		Although an ion engine does not develop enough thrust to launch a rocket into earth orbit, it is considered practical for propelling one through interplanetary space on long-distance trips, e.g., between the earth and Jupiter.
	reference.aol.com /columbia/_a/ion/20051206060609990011 (758 words)

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