[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-665655-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-665655-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","pi-systems-molecular-orbital-diagrams","PI Systems - Molecular Orbital Diagrams","","This document provides an educational overview of PI systems and the formation of molecular orbital diagrams, specifically focusing on the interaction of 2p atomic orbitals. It details the principles of orbital hybridization in systems like ethylene and the allyl anion, explaining how resonance forms create new systems of molecular orbitals. The content covers the relationship between node counts and energy levels in these systems, establishing a general principle where n interacting p orbitals combine to form n molecular orbitals. It serves as a technical resource for understanding chemical bonding, electron delocalization, and energy distribution in pi systems, useful for students and practitioners of organic chemistry.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/technology/","Technology",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/pi-systems-molecular-orbital-diagrams/665655/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/pi-systems-molecular-orbital-diagrams/665655.png","ImageObject",300,407,{"name":42,"@type":43},"Chumphorn","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-30","2026-10-29",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",5,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"How does the number of nodes in a molecular orbital affect its energy?","Question",{"text":63,"@type":64},"There is a direct relationship between nodes and energy; as the number of nodes increases, the energy of the molecular orbital system also increases.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"What happens when resonance occurs in a molecular system?",{"text":68,"@type":64},"When systems have resonance forms, interacting p bonds and unshared pairs rehybridize to form a new, unified system of molecular orbitals.",{"name":70,"@type":61,"acceptedAnswer":71},"What is the general rule for determining the number of resulting molecular orbitals?",{"text":72,"@type":64},"When n p-orbitals form a resonance system, they hybridize to form exactly n pi molecular orbitals.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},665655,1793305505,{"code":4,"msg":82,"data":83},"success",[84,88,92,96,100,104,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":93,"show_sort_weight":94,"slug":95},"Exam",70,"exam",{"id":55,"doc_module":4,"doc_module_name":25,"category_name":97,"show_sort_weight":98,"slug":99},"Comic",60,"comic",{"id":101,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":102,"slug":103},6,50,"technology",{"id":105,"doc_module":4,"doc_module_name":25,"category_name":106,"show_sort_weight":107,"slug":108},7,"Healthcare",40,"healthcare",{"id":110,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},8,"Research & Report",30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":55,"slug":129},19,"General","general",{"code":4,"msg":82,"data":131},{"doc_id":79,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":101,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":139,"language":140,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":12,"update_tm":80,"read_time":144},2336475401981,"https://ap-avatar.wpscdn.com/avatar/22000c94efd8d5204d?x-image-process=image/resize,m_fixed,w_180,h_180&k=1786935347598174694","Sections 6.6 and 6.11  \nPI SYSTEMS  \nMOLECULAR ORBITAL DIAGRAMS  \nPI( p ) MOLECULAR ORBITAL SYSTEMS  \nTWO 2p ORBITALS-ETHYLENE  \nH   HC  C  \nH H  \nsp 2 sp 2  \nH  HC  C  \nH H  \n2p 2p  \nHigher energy = additional node  \np *  \nTwo atomic 2p orbitals combine to make api system of two molecular orbitals.  \np  \nORBITAL ENERGY AND NODES  \nRELATIONSHIP BETWEEN NODES AND ENERGY  \n\n| | |\n| --- | --- |\n| \u003Cbr>\u003Cbr>node\u003Cbr>|  |\n| \u003Cbr>|  |\n|  |  |\n\n2 nodes  \n3n  \n1 node  \n2n  \n0 nodes  \nn  \nm  \no  \nr  \ne  \nn  \no d  \ne  \ns  \nE = Hn  \nE  \nN  \nE  \nR  \nG  \nY  \nd  \np  \ns  \nPI MOLECULAR ORBITAL SYSTEMS  \nTHREE 2p ORBITALS-ALLYL ANION  \n-  \n..  \nCH 2 CH  CH 2  \nSystems that have resonance form:  \npi molecular orbital systems.  \nThe interacting p bonds and unshared pairs rehybridize to form new system of orbitals.  \nFORMATION OF A PI MOLECULAR ORBITAL SYSTEM  \nno resonance resonance  \n~~ ~~ p*  n  p  \np 3  \np2  \np 1  \nCH2  CH  CH 2  \n-  \n..  \nCH 2 CH CH 2  \np  \nn  \n-  \npi bond + empty 2p  \npi molecular orbital system  \nThree atomic p orbitals combine to make a pi system of three molecular orbitals.  \np 3  \np2  \np 1  \nGENERAL PRINCIPLE  \nWhen the number of p orbitals  \nforming a resonance system = n ….. they will “hybridize” …..  \nto form the same number (n) of pi molecular orbitals.  \nfour 2p….. give …. four molecular orbitals ( p+p+p+p….  p 1 + p2 + p3 + p4 )  \nn 2p….. gives …. n molecular orbitals","cbCaipbKnjAqnsNi","https://ap.wps.com/l/cbCaipbKnjAqnsNi","pdf",832840,26,"English","# PI Systems\n## Two 2p Orbitals - Ethylene\n## Three 2p Orbitals - Allyl Anion\n## General Principle of Formation","[{\"question\":\"How does the number of nodes in a molecular orbital affect its energy?\",\"answer\":\"There is a direct relationship between nodes and energy; as the number of nodes increases, the energy of the molecular orbital system also increases.\"},{\"question\":\"What happens when resonance occurs in a molecular system?\",\"answer\":\"When systems have resonance forms, interacting p bonds and unshared pairs rehybridize to form a new, unified system of molecular orbitals.\"},{\"question\":\"What is the general rule for determining the number of resulting molecular orbitals?\",\"answer\":\"When n p-orbitals form a resonance system, they hybridize to form exactly n pi molecular orbitals.\"}]","PI Systems - Molecular Orbital Diagrams | PDF",66]