http://debianws.lexgopc.com/wiki143/index.php?action=history&feed=atom&title=Valency_interaction_formula 2026-05-12T23:02:07Z Revision history for this page on the wiki MediaWiki 1.43.1 http://debianws.lexgopc.com/wiki143/index.php?title=Valency_interaction_formula&diff=7230295&oldid=prev 2022-10-26T05:19:07Z

<p>Add: bibcode. Removed proxy/dead URL that duplicated identifier. Removed access-date with no URL. | <a href="/wiki143/index.php?title=WP:UCB&amp;action=edit&amp;redlink=1" class="new" title="WP:UCB (page does not exist)">Use this bot</a>. <a href="/wiki143/index.php?title=WP:DBUG&amp;action=edit&amp;redlink=1" class="new" title="WP:DBUG (page does not exist)">Report bugs</a>. | Suggested by Headbomb | Linked from Wikipedia:WikiProject_Academic_Journals/Journals_cited_by_Wikipedia/Sandbox | #UCB_webform_linked 575/614</p> <p><b>New page</b></p><div>The &#039;&#039;&#039;Valency Interaction Formula&#039;&#039;&#039;, or &#039;&#039;&#039;VIF&#039;&#039;&#039; provides a way of drawing or interpreting the molecular [[structural formula]] based on [[molecular orbital theory]]. Valency Points, VP, dots drawn on a page, represent [[valence orbital]]s. Valency Interactions, VI, that connect the dots, show interactions between these valence orbitals. Theory was developed by Turkish quantum chemist [[Oktay Sinanoğlu]] in the early 1980s and first published in 1983. The theory was like a new language of [[quantum mechanics]] by the exact definition of [[Hilbert space]]. It was also the solution of the problem that [[Paul Dirac]] was trying to solve at the time of his death in 1984, which concerned the hidden symmetries in Hilbert space which were responsible for the accidental degeneracies not arising from a spatial symmetry, that was about the higher symmetries of Hilbert space) Sinanoğlu showed that the solution was possible only when the topology tool was used. This VIF theory also connected both delocalized and [[localized molecular orbitals|localized molecular orbital]] schemes into a unified form in an elegant way.<br /> <br /> Chemical deductions are made from a VIF picture with the application of two pictorial rules. These are [[linear transformation]]s applied to the VIF structural formula as a [[quantum operator]]. Transformation by the two rules preserves [[Invariant (mathematics)|invariants]] crucial to the characterization of the molecular electronic properties, the numbers of bonding, [[Non-bonding orbital|non-bonding]], and [[Antibonding molecular orbital|anti-bonding]] orbitals and/or the numbers of doubly, singly, and unoccupied valence orbitals. The two pictorial rules relate all pictures with the same electronic properties as characterized by these invariants.<br /> <br /> A thorough presentation of VIF is available through the [[open access journal]] &#039;&#039;symmetry&#039;&#039;.&lt;ref&gt;{{cite journal |title=Chemical Reasoning Based on an Invariance Property: Bond and Lone Pair Pictures in Quantum Structural Formulas |last=Alia |first=Joseph |date=2010 |journal=Symmetry |publisher=MDPI |volume=2 |issue=3 |pages=1559–1590 |doi=10.3390/sym2031559 |bibcode=2010Symm....2.1559A |doi-access=free }}&lt;/ref&gt;<br /> <br /> ==See also==<br /> * [[Structural Formula]]<br /> * [[Lewis Structure]]<br /> * [[Valence Bond Theory]]<br /> <br /> ==References==<br /> &lt;references /&gt;<br /> <br /> {{DEFAULTSORT:Valency Interaction Formula}}<br /> [[Category:Theoretical chemistry]]<br /> {{one source|date=October 2012}}<br /> <br /> <br /> {{theoretical-chem-stub}}</div>

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