Valence tautomerism is a type of tautomerism in which single and / or double bonds are rapidly formed and ruptured, without migration of atoms or groups.

* Chemistry: Molecular theory — Kinetic theory of gases — Molecular orbital theory — Valence bond theory — Transition state theory — RRKM theory — Chemical graph theory — Flory-Huggins solution theory — Marcus theory — Lewis theory ( successor to Brønsted – Lowry acid – base theory ) — HSAB theory — Debye – Hückel theory — Thermodynamic theory of polymer elasticity — Reptation theory — Polymer field theory — Møller – Plesset perturbation theory — Density Functional Theory — Frontier molecular orbital theory — Polyhedral skeletal electron pair theory — Baeyer strain theory — Quantum theory of atoms in molecules — Collision theory — Ligand field theory ( successor to Crystal field theory ) — Variational Transition State Theory — Benson group increment theory — Specific ion interaction theory

The Quantized Valence Bonds ' Molecular Mechanics ( QVBMM ) force field ( implemented in Exorga, Incorporated's StruMM3D product, once named STR3DI32 ) is unique in molecular mechanics as the only one to directly use all lone pair interactions in all of its energy calculations.

Valence bond theory now complements molecular orbital ( MO ) theory, which does not adhere to the VB idea that electron pairs are localized between two specific atoms in a molecule but that they are distributed in sets of molecular orbitals which can extend over the entire molecule.

Valence bond theory views aromatic properties of molecules as due to resonance between Kekulé, Dewar and possibly ionic structures, while molecular orbital theory views it as delocalization of the π-electrons.

Ordinary questions of discipline are in the ordinary course settled in councils, often held with the assent of the kings, but on great occasions – the Councils of Epaone ( 517 ), Vaison ( 529 ), Valence ( 529 ), Orléans ( 538 ), Tours ( 567 ) – the bishops declare that they are acting under the impulse of the Holy See, or defer to its admonitions ; they take pride in the approbation of the pope ; they cause his name to be read aloud in the churches, just as is done in Italy and in Africa they cite his decretals as a source of Canon Law ; they show indignation at the mere idea that anyone should fail in consideration for them.

The Segway PT ( PT is an initialism for personal transporter while the old suffix HT was an initialism for human transporter ) has electric motors powered by Valence Technology phosphate-based lithium-ion batteries which can be charged from household current.

He also had a brother Peter of Savoy who was named Earl of Richmond in 1240 and yet another brother William of Savoy, who was Bishop of Valence and a candidate to be Bishop of Winchester in England.

According to one chronicle, he gathered some of his most trusted men around him, including Henry de Lacy, Earl of Lincoln, Guy de Beauchamp, Earl of Warwick, and Aymer de Valence, soon to be Earl of Pembroke.

Weighting of the of resonance structures in terms of their contribution to the overall structure can be calculated in multiple ways, using " Ab initio " methods derived from Valence Bond theory, or else from the Natural Bond Orbitals ( NBO ) approaches of Weinhold NBO5, or finally from empirical calculations based on the Hückel method.

On 5 April, he appointed Aymer de Valence, Comyn's brother-in-law, and the future Earl of Pembroke, as his plenipotentiary in Scotland, with powers to raise the Dragon Banner, signifying that no quarter would be given to Bruce and his adherents ; or, as the chronicler John Barbour puts it ' to burn and slay and raise dragon '.

His first mission in Valence in August 1942 was relatively uneventful, and he returned to England, but in May 1943 he was sent back to build an organisation, to be known as the Acrobat network, around Saint-Étienne and Dijon.

Gaveston ensconced himself at Scarborough Castle, and on 19 May 1312 agreed on a surrender to Aymer de Valence, Earl of Pembroke, as long as his security would be guaranteed.

Some other programs are not linked to an advertising deal, for example Smoove with Vélomagg ' in Montpellier, Vélopop ' in Avignon, Libélo in Valence and Vélivert in Saint-Étienne but can be financed by public support.

During World War II in 1940, the Prytanée had to be moved for a few years successively to Billom, Valence, then Briançon.

He painted local scenes and some of his work can still be seen in Valence House Museum.

Later conversions of barns and cottages would be by either building an intergal kiln within one end of the building, as seen at Biddenden, Kent or adding kilns externally to the existing building, as seen at Barnhill Farm, Hunton and also at Sutton Valence.

It was then flown in a short hop to RAF Moreton Valence three miles ( 5 km ) to the south, where the aircraft would be completed.

Following their review of parliamentary representation the Boundary Commission for England recommended that the wards of Alibon, Parsloes and Valence be transferred from the old Dagenham constituency to Barking, and that following a review of ward boundaries a small part of River ward be transferred from Barking to help form the new Dagenham and Rainham constituency.

Linus Pauling's second rule of ionic bonding, the Electrostatic Valence Principle states, " An ionic structure will be stable to the extent that the sum of the strengths of the electrostatic bonds that reach an anion equals the charge on that anion.

The books that were influential in the early development of computational quantum chemistry include Linus Pauling and E. Bright Wilson's 1935 Introduction to Quantum Mechanics – with Applications to Chemistry, Eyring, Walter and Kimball's 1944 Quantum Chemistry, Heitler's 1945 Elementary Wave Mechanics – with Applications to Quantum Chemistry, and later Coulson's 1952 textbook Valence, each of which served as primary references for chemists in the decades to follow.

The English initially met with success ; on 19 June, Aymer de Valence routed Bruce at the Battle of Methven.

Another account of his deathbed scene is more credible ; according to one chronicle, Edward gathered around him the earls of Lincoln and Warwick, Aymer de Valence, and Robert Clifford, and charged them with looking after his son Edward.

Aymer de Valence, 2nd Earl of Pembroke, a moderate baron with strong French links, asked Isabella to intervene in an attempt to prevent war ; Isabella publicly went down on her knees to appeal to Edward to exile the Despensers, providing him with a face-saving excuse to do so, but Edward intended to arrange their return at the first opportunity.

* Valence ( psychology ) ( and neuroscience ), referring to the emotional value associated with a stimulus ; e. g., a familiar face can have positive valence

He was also involved in disputes with the king's half-brothers, especially Aymer de Valence, who was Bishop of Winchester.

Boniface's quarrel with Aymer de Valence over the a hospital in Southwark led to the archbishop's palace at Lambeth being plundered and one of Boniface's functionaries being kidnapped.

The next holder of the lands of the Earldom of Pembroke was William de Valence, a younger son of Hugh de Lusignan, count of La Marche, by his marriage with Isabella of Angoulême, widow of the English King John.

In exchange, SNCF allows passengers on these flights to book rail service between Paris-Charles de Gaulle Airport in Roissy ( near Paris ) and Aix-en-Provence, Angers, Avignon, Bordeaux, Le Mans, Lille, Lyon Part-Dieu, Marseille, Montpellier, Nantes, Nîmes, Poiters, Rennes, Tours, and Valence with their airline.

Constantine's two generals Iustinianus and the Frank Nebiogastes, leading the vanguard of his forces, were defeated by Sarus, and Stilicho's lieutenant, with Nebiogastes being first trapped in, then killed outside, Valence.

In 2001 the Gare de Valence TGV opened along with the LGV Méditerranée, a high-speed rail line extending south from Valence to Marseilles.

The station is only south of the end of the LGV Rhône-Alpes, giving Valence much shorter journey times to northern destinations as well, with a journey to Paris taking 2h11.

Valence is now developing its high level educational role in the Drôme / Ardèche area with one INPG engineering school ( ESISAR ), one Institut universitaire de technologie ( IUT ) and annexes of three universities ( UPMF, UJF, Stendhal ).

Valence is twinned with:

The massacre of St Bartholomew — occurring as he was about to accompany the bishop of Valence on an embassy to Poland — made Scaliger flee, together with other Huguenots, for Geneva, where he was appointed a professor in the academy.

Roger marched out from Artah with Bernard of Valence, the Latin Patriarch of Antioch.

Valence bond theory gives us a model for benzene where each carbon atom makes two sigma bonds with its neighbouring carbon atoms and one with a hydrogen atom.

Polvo reformed with new drummer Brian Quast, formerly of Vanilla Trainwreck and the Cherry Valence, after being invited to appear at All Tomorrow's Parties 2008 and the Primavera Sound Festival in Barcelona, Spain.

This claim is largely disputed by historians, with the real Battle of Loudoun Hill being fought between the Scottish forces of Robert Bruce and the English forces of Aymer de Valence on May 10, 1307.

* Valence Technologies Inc. battery education page

After graduation and a brief sojourn at the Military School of Paris Napoleon applied for second-lieutenancy in the artillery regiment of La Fère at Valence and after a time was given the position.

* Valence bond programs.

Don Francisco Amorós y Ondeano, marquis de Sotelo, was born on February 19, 1770 in Valence and died on August 8, 1848 in Paris.

Honorius supported the claims of William of Malines, the new Archbishop of Tyre who claimed jurisdiction over some of the sees that had traditionally belonged to Bernard of Valence, the Patriarch of Antioch.

The Hall of Valence Mary, as it was originally known, was thus founded to house a body of students and fellows.

However, an identical phrase appears in an agreement between Edward and his lieutenant and lifelong friend, Aymer de Valence.

In April, Bruce won a small victory over the English at the Battle of Glen Trool, before defeating Aymer de Valence, 2nd Earl of Pembroke at the Battle of Loudoun Hill.

After a successful siege of Valence, he captures the usurper Jovinus and his brother Sebastianus.

* The Valence Cathedral is consecrated in Valence, France.

* Sutton Valence School is founded by William Lambe.

* June 23 – Aymer de Valence, 2nd Earl of Pembroke ( b. 1270 )

* Aymer de Valence, 2nd Earl of Pembroke ( d. 1324 )

* December 5 – Aymer de Valence, Bishop of Winchester ( b. 1222 )

By mid-July, Aymer de Valence, 2nd Earl of Pembroke was advising the king to make war on the barons who, unwilling to risk their lives, entered negotiations in September 1312.

The French declaration of war against Tuscany led to his removal ( he was escorted by the Spaniard Pedro Gómez Labrador, Marquis of Labrador ) by way of Parma, Piacenza, Turin and Grenoble to the citadel of Valence, the chief town of Drôme where he died six weeks after his arrival, on 29 August 1799, having then reigned longer than any Pope ( except possibly St. Peter ).

Pius VI's body was removed from Valence on 24 December 1801 and buried at Rome 19 February 1802, when Pius VI was given a Catholic funeral, attended by Pope Pius VII.

Edward was suffering ill health by this time, and instead of leading an expedition himself, he gave different military commands to Aymer de Valence and Henry Percy, while the main royal army was led by the Prince of Wales.

In February 1307, Bruce reappeared and started gathering men, and in May he defeated Aymer de Valence at the Battle of Loudoun Hill.