Payvasthoi aromati (az yunoni aroma — khushbuy), p a y v a s t h oi mushkin, sinfi payvasthoi organikii siklie, ki hamai atomhoi onho dar hosil kardani sistemai yagonai bo hamdigar aloqamand ishtirok mekunand; l-elektronhoi chunin sistema qabati elektronii ustuvori sarbasta hosil mekunand. Ba Payvasthoi aromati benzol (I, I …

Payvasti parallel dar elektrotekhnika, payvastani elementkhoi duqutbai zanjiri elektrist (istemolkunandahoi khud manbahoi energiyai elektr), ki ba qutbhoyash shiddati buzurgiash yakkhe­la tasir mekunad. Payvasti parallel asositarin usuli vasl namudani istemolokunandahoi energiyai elektr meboshad. Dar vaqti Payvasti parallel az zanjir chudo kar­dan yo khud ba zanchir payvastani istemolkunandahoi chudogona kori istemolkunandagoni digarro …

Payvasthoi asikli, p a yv a s t ho i  g a y r i tasalsul, pay­va s t h o i alo f a t k, payvastdoi organikie, ki molekulaashon az silsilai «kushod» iborat ast. Payvasthoi asiklie, ki dar onho atomhoi karbon dar yak khat joygir shudaand (masalan, m-buggan …

Payvasthoi geterosikli, geterosiklho, payvasthoi organikii sokhti sikli (se, chor, panjkunja va az in hm ziyod) doshtae, ki dar tarkibashon gayr az atomhoi karbon boz atomhoi digar elementho geteroatomho va gayra dorand. Payvasthoi geterosikliro bo miqdori atomhoi sikl (halqa), khususiyat, adad va joi geteroatom, budan yo nabudani joynishin, khususiyati aromati doshtan …

Payvasthoi kalonmolekula, payvasthoi khimiyavie, ki molekulakhoyashon az sadho va hazorho atom iboratand. Sifati khosi aksari Payvasthoi kalonmolekula, ki onhoro polimerho niz menomand, hamin ast, ki dar molekulai onho takrori silsilaho bisyor ast. Nigared niz Polimerho.

Payvasthoi kompleksi, payvasthoi koordinasion i, yak sinfi makhsusi payvasthoi khimiyaviero guyand, ki dar natijai ba yagon ion (yo atom) payvast shudani molekulahoi neytrali yo ionhoi digar hosil meshavand. Payvasthoi kompleksi sokhti khose dorand. Masalan, payvasti az reak­siyai- Pt£l< + 2KS1 KalPtCle] hosilshuda sokhti zerin dorad: Yadroi Payvasthoi kompleksi yo khud …

Payvasthoi koordinatsioni, nigared Payvasthoi kompleksi.

Payvasthoi organikii alyuminiy, payvasthoi khimiyavie, ki dar molekulaashon bandi alyumi­niy-karbon (A1—S) dorand. Payvasthoi organikii alyuminiy purra RjAl va nopurra R2A1X yo RAlXj meshavand (dar in 40 R—SN3, S2Nb, SvN8 va sh X — galogen, OR yo N). Alyuminiytrialkilho RjAl (R— —SNz, CfHs va r.) moddahoi moei berang buda, az tasiri …

Payvasthoi organikii litiy, payvasthoi khimiyavie, ki dar molekulaashon bandi litiy-karbon (Li—S) dorand, chunonchi, R—Li (R— radikal). Payvasthoi organikii litiyi alifaty moddahoi kristalli (R=CH3,G2H5 var.), moei reliz (R = n — S3N7, n — S4NE va r.) yo moddai zudgudozi mummonand buda, dar karbogidridho va efirho nagz hal meshavand. Payvasthoi organikii …

Payvasthoi organikii metallho, payvastnoi khimiyavie, ki dar onho atomi yagon metall bo ato­mi karbon bevosita payvast shudaast. Payvasthoi organikii metallho az rui bandi metall karbon (M — S) ba du guruh chudo me­shavand: 1) payvasthoi organikii elementhoi basit (oddi) yo khud gayri mutavassit va mutavassit (bo karbon bandi oddi — …