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Topic: Instantaneous dipole attraction

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	Dipole
		Dipoles can be characterized by their dipole moment, a vector quantity with a magnitude equal to the product of the charge or magnetic strength of one of the poles and the distance separating the two poles.
		The direction of the dipole moment corresponds to the direction from the negative to the positive charge or from the south to the north pole.
		Instantaneous dipoles: These occur due to chance when electrons happen to be more concentrated in one place than another in a molecule, creating a temporary dipole.
	www.ebroadcast.com.au /lookup/encyclopedia/ma/Magnetic_dipole.html (479 words)

	Dipole - Facts, Information, and Encyclopedia Reference article
		From the point of view of the mathematics of distributions, a dipole can be taken to be the directional derivative of a Dirac delta function.
		A dipole (Greek: dyo = two and polos = pivot) is a pair of electric charges or magnetic poles of equal magnitude but opposite polarity (opposite electronic charges), separated by some (usually small) distance.
		The field of a point dipole has a particularly simple form, and the order-1 term in the multipole expansion is precisely the point dipole field.
	www.startsurfing.com /encyclopedia/d/i/p/Dipole.html (955 words)

	Dipole Information Center - dipole cb antennas
		Dipoles can be characterized by their dipole moment, what is magnetic dipole moment sloping dipole antennas a vector quantity with vhf folded dipole a magnitude equal to the product of the charge or magnetic strength of one of the poles and the distance separating the two poles.
		The direction of the dipole moment corresponds to the direction from the negative to the folded dipole construction positive charge or from the south to the north pole.
		This is dipole antenna calculator exactly the field of a point dipole, exactly the dipole dipole dipole term in the multipole expansion of an arbitrary field, and approximately the field of any dipole-like configuration dipole moment at large distances.
	www.scipeeps.com /Sci-Chemistry_Topics_Co_-_D/Dipole.html (1051 words)

	Dipole Information - dipole cb antennas
		The direction of the dipole moment corresponds to the direction from the negative to the positive charge quarter wave dipole or dipole chemistry from the dipole dipole south to the north pole.
		Since the direction make dipole antenna of an electric field is defined as the direction of dipole the force on a positive charge, electric vhf folded dipole field lines point away from a positive charge and toward a negative charge.
		Instantaneous dipoles: These occur due to chance when electrons happen how does a dipole dipole forces antenna work to be more concentrated in one place than another in a molecule, creating a temporary dipole.
	www.inanot.com /Ina-Electronics_Topics_D-/Dipole.html (1123 words)

	Dipole Summary
		The dipole moment is equal to the magnitude of the equal and opposite charges multiplied by the distance between the centers of the charge distributions.
		For magnetic dipoles, the dipole moment points from the magnetic south to the magnetic north pole — confusingly, the "north" and "south" convention for magnetic dipoles is the opposite of that used to describe the Earth's geographic and magnetic poles, so that the Earth's geomagnetic north pole is the south pole of its dipole moment.
		Although there are no known magnetic monopoles in nature, there are magnetic dipoles in the form of the quantum-mechanical spin associated with particles such as electrons (although the accurate description of such effects falls outside of classical electromagnetism).
	www.bookrags.com /Dipole (2186 words)

	Intermolecular force - Wikipedia, the free encyclopedia
		The latter dipole is induced by the electric field offered by the permanent dipole of water (see field from an electric dipole).
		This permanent dipole-induced dipole interaction is referred to as induction (or polarization) interaction and is to be distinguished from the London dispersion interaction.
		The latter is sometimes described as an interaction between two instantaneous dipoles, see molecular dipole.
	en.wikipedia.org /wiki/Instantaneous-dipole_induced-dipole_attraction (1371 words)

	Dipole (Site not responding. Last check: 2007-10-10)
		A dipole is a pair of electric charges ormagnetic poles of equal magnitude but opposite polarity, separated by some (usually small) distance.
		Dipoles can be characterizedby their dipole moment, a vector quantity with a magnitude equal tothe product of the charge or magnetic strength of one of the poles and the distance separating the two poles.
		The direction ofthe dipole moment corresponds to the direction from the negative to the positive charge or from the south to the north pole.
	www.therfcc.org /dipole-30865.html (432 words)

	Science Fair Projects - Dipole
		A dipole (Greek: dyo = two and polos = pivot) is a pair of electric charges or magnetic poles of equal magnitude but opposite polarity (opposite electronic charges), separated by some (usually small) distance.
		The field of a point dipole has a particularly simple form, and the order-1 term in the multipole expansion is precisely the point dipole field.
		This is exactly the field of a point dipole, exactly the dipole term in the multipole expansion of an arbitrary field, and approximately the field of any dipole-like configuration at large distances.
	www.all-science-fair-projects.com /science_fair_projects_encyclopedia/Dipole_moment (972 words)

	Bambooweb: Boiling point
		Since heat is added with no corresponding change in temperature, the heat capacity of the liquid is essentially infinite at the boiling point.
		In terms of intermolecular interactions, the boiling point represents the point at which the liquid molecules possess enough heat energy to overcome the various intermolecular attractions binding the molecules into the liquid (eg.
		dipole-dipole attraction, instantaneous-dipole induced-dipole attractions, and hydrogen bonds).
	www.bambooweb.com /articles/b/o/Boiling_point.html (442 words)

	de Dipol A dipole is a pair of electric...
		The direction of the dipole moment corresponds to the direction from the negative to the positive charge or from the south south to the north pole north pole.
		Spherical dipole Spherical dipoleStrictly speaking a dipole contains only two point charges (or magnetic poles), however various arrangements of multiple charges or currents have dipole moments and may be treated as an effective dipole.
		"Instantaneous dipoles: " These occur due to chance when electrons electrons happen to be more concentrated in one place than another in a molecule molecule, creating a temporary dipole.
	www.biodatabase.de /dipole (519 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal (Site not responding. Last check: 2007-10-10)
		For the simple electric dipole given above, the electric dipole moment would point from the negative charge towards the positive charge, and have a magnitude equal to the strength of each charge times the separation between the charges.
		For the current loop, the magnetic dipole moment would point through the loop (according to the right hand rule), with a magnitude equal to the current in the loop times the area of the loop.
		Although there are no known magnetic monopoles in nature, there are magnetic dipoles in the form of the quantum-mechanical spin associated with particles such as electrons (although the accurate description of such effects falls outside of classical electromagnetism).
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=dipole_moment (1565 words)

	Intermolecular Attractions or van der Waals Forces
		This short term, very weak attraction is enough to cause slight variations in the actual pressure and volume of a gas compared to the ideal gas law predictions.
		The rank for increasing induced dipole force is water < hydrogen sulfide < hydrogen selenide, because induced dipole force increases as the size of the molecule increases.
		Attractions between a hydrogen (bonded to an oxygen or nitrogen) and oxygen or nitrogen on a different part of the molecule twist the three dimensional shape and hold it in place.
	www.chemprofessor.com /imf.htm (1089 words)

	London Forces
		The additional attraction is the result of London forces, which contribute to the attractions between polar molecules as well as nonpolar ones.
		Molecules that undergo this instantaneous increase in their dipole are then able to induce an increase in the dipoles of other molecules.
		The increased attractions between polar molecules that come from the higher charges that arise due to instantaneous increases in dipoles and induced increases in dipoles are London forces.
	www.mpcfaculty.net /mark_bishop/London_polar_molecules.htm (441 words)

	ChemViz Polarization of Electron Clouds Lab
		Large atoms and molecules have electron clouds that may experience an instantaneous dipole in which at any given moment a surplus of electron density may exist within one region of the electron cloud.
		The instantaneous dipole created in one molecule may induce a dipole in another nearby molecule by polarizing its electron cloud.
		Instantaneous and induced dipoles are the only way that non-polar molecules may bond together intermolecularly to form liquid and solids.
	chemviz.ncsa.uiuc.edu /content/lab-s-polar.html (1463 words)

	unit02-sect04-les02-lessonb (Site not responding. Last check: 2007-10-10)
		By definition, single unbonded atoms lack bond dipoles and molecular dipoles; therefore, atoms of noble gases are nonpolar.
		An instantaneous dipole in one atom may cause a redistribution of electrons in a neighbouring atom or an induced dipole.
		The intermolecular attractions within these substances occur between all the adjacent molecules or atoms in three dimensions throughout the sample.
	www.cdli.ca /courses/chem2202/unit02/section04/lesson02/3-lesson-b.htm (489 words)

	Untitled Document
		The strength of the attraction depends on the magnitude of the charge on the ion, the magnitude of the dipole moment and the distance between center of the ion and the midpoint of the polar molecule.
		The attraction arises because of the permanent dipole in the polar molecule.
		So we expect the magnitude of the instantaneous dipoles, and therefore the strength of the London forces, to be greater the greater the number of atoms in a molecule and the larger the atoms.
	intro.chem.okstate.edu /1515SP01/Lecture/Chapter12/Lec2201.html (2390 words)

	Intermolecular Forces of Attraction
		In an ionic solid, adjacent ions have electrostatic attractions and are arranged in a lattice structure.
		The greater the polarity (difference in electronegativity of the atoms in the molecule), the stronger the dipole-dipole attraction.
		Dipole-dipole attractions are very weak and substances held together by these forces have low melting and boiling point temperatures.
	library.thinkquest.org /C006669/data/Chem/bonding/inter.html (792 words)

	Media Portfolio
		The attraction between instantaneous dipoles is called the dispersion force.
		The dipole arises from a combination of polar covalent bonds and favorable geometry.
		This attraction between permanent dipoles is called the dipoleÐdipole force.
	wps.prenhall.com /wps/media/objects/476/488316/ch12.html (1969 words)

	Glossary: I
		A temporary dipole moment in a species created as a result of a dipole in a neighboring species and resulting in an attraction between the species.
		A temporary dipole moment in a species created as a result of the influence of a dipole moment in another species, and resulting in an attraction between the two species.
		The electrostatic attraction that holds together the ions of an ionic compound.
	www.uwplatt.edu /chemep/chem/chemscape/LABDOCS/glossary/idef.htm (644 words)

	Untitled Document
		Simply put, one atom can have an instantaneous dipole moment that induces a moment in the other atom -- slightly polarizing it -- and causing the two dipoles to attract each other.
		The mutual interaction of the two atoms is then described by a "dipole-dipole" interaction rather than the "dipole-induced dipole" interaction of the ground state.
		Since the long-range curvature of the excited state potential is functionally dependent on the atomic dipole transition moment, one can extract a value for this moment by accurately measuring the excited state potential.
	atomcool.rice.edu /collisions.htm (788 words)

	Chapter 13. Discussion 01. (Site not responding. Last check: 2007-10-10)
		As with all electrostatic attraction, the magnitude of the attraction increases with the size of the charge (both on the ion and on the dipole).
		The instantaneous partial positive charge attracts the electrons in a neighboring molecule toward itself, and the instantaneous partial negative charge repels electrons in another neighboring molecule.
		In this case differences in the magnitudes of the attractive forces are due to differences in the strengths of dipole-dipole attractions, with the most polar molecules having the strongest attractions.
	userpages.umbc.edu /~neumann/Chem102/Notes/ch11/c1302d.html (878 words)

	Media Portfolio
		A displacement of the electronic charge produces an instantaneous dipole with a charge separation represented as d1 and d2.
		The instantaneous dipole on the left induces a charge separation in the molecule on the right.
		Dipoles tend to arrange themselves with the positive end of one dipole pointed toward the negative end of a neighboring dipole.
	cwx.prenhall.com /petrucci/medialib/media_portfolio/13.html (1531 words)

	Weak Bonds - Van der Waals Forces (Site not responding. Last check: 2007-10-10)
		Because part of the molecule is partially positive (not as positive as an ion with a +1 charge) there are attractions between the negative portion of one molecule and the positive portion of another molecule.
		When hydrogen is one of the atoms within a molecule that is attracted to the dipole on another molecule, this somewhat stronger dipole-dipole attraction is called a hydrogen bond.
		Therefore, the greater the surface area (generally this means the bigger the molecule) the stronger the attraction between two molecules of this type due to London dispersion forces.
	chemsite.lsrhs.net /ChemicalBonds/intermolecular_forces.html (423 words)

	lecdec6.html
		The attraction between molecules is an intermolecular force.
		In that instant, a dipole is formed (called an instantaneous dipole).
		One instantaneous dipole can induce another instantaneous dipole in an adjacent molecule (or atom).
	andromeda.rutgers.edu /~jimms/lec16s.htm (1011 words)

	molecules.dcr
		Interactions between ions, dipoles, and induced dipoles account for many properties of molecules - deviations from ideal gas behavior in the vapor state, and the condensation of gases to the liquid or solid states.
		It is possible that these forces arise from the fluctuating dipole of one molecule inducing an opposing dipole in the other molecule, giving an electrical attraction.
		The stronger farther-reaching electrical forces from ions and dipoles are considered to operate in addition to these forces.
	web.umr.edu /~gbert/INTERACT/intermolecular.HTM (904 words)

	Chemical Bonding - An Introduction
		The ions are (to an extent) fixed in their position within the crystal lattice and have difficulty moving from these positions, being held in position by their attraction to the surrounding ions.
		This intermolecular attraction is termed "hydrogen bonding", and acts almost like a glue holding the molecules of water together.
		Intermolecular forces of attraction, those not involving ions, are generally referred to as van der Waal’s forces.
	www.newi.ac.uk /buckleyc/bonding.htm (2420 words)

	Kids.Net.Au - Encyclopedia > Dipole (Site not responding. Last check: 2007-10-10)
		(Because of the absence of magnetic monopoles, magnetic dipoles are actually created by current loops or by quantum-mechanical spin.)
		τ = p X E (Electric dipole moment p)
		The magnetic or electric field near a dipole decreases with distance (r) as 1/r
	www.kids.net.au /encyclopedia-wiki/di/Dipole (504 words)

	Intermolecular Forces
		The more electrons a molecule possesses, the greater the chance there is of an instantaneous dipole (uneven charge distribution) occurring; meaning that Van der Waals forces will be stronger.
		The temporary separations of charge that lead to the London force attractions are what attract one nonpolar organic molecule to its neighbors.
		The linear molecules have higher melting and boiling points because of the increased attractions.
	www.tenafly.k12.nj.us /~shilfstein/reference.htm (1101 words)

	Slides30
		One molecule has an instantaneous, temporary dipole moment as its valence electron cloud shape oscillates slightly.
		The instantaneous dipole in one molecule induces a temporary dipole in the nearby molecule.
		The ease with which a valence electron cloud shape is distorted is determined by the atom or molecule's "polarizability".
	www.andrew.cmu.edu /course/09-105/S98Slides25.html (418 words)

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