green-davis-mingos niyam

organometallic rasayan vigyaan mein, green-davis-mingos niyam nucleophilic key liye kaee asantript ligand vaale 18-electron dhaatu parisaron key atirikt regiochemistry kii bhavishyavani karate hain. yeye niyam 1978 mein organometallic rasaayanagya stephen jee dwara prakaashit kiye gaye they. david, malcum green aur michael mingos. way varnan karate hain kii kaise aur kahaan asantript hydrocarbon aam taur parr jatilata parr nucleophilic hamale key liye adhik samvedansheel hoe jaataa haye.
niyam 1.
nucleophilic hamale koo summ-sankhya vaale paulin (yahaan taka kii hapticity) parr bhee pasand kiya jaataa haye.
niyam 2.
nucleophile prathamikta seey chakreeya polyn key bajaay chakreeya polyn mein jodate hain.
niyam 3.
nucleophile adhimaantah ack terminus parr summ-hapticity paulin ligand mein jodate hain.
nucleophile ack antim sthiti mein visham-hapticity acyclic paulin ligand mein jodate hain yadi dhaatu atyadhik electrophilic haye, anyatha way ack aantarik sthal parr jodate hain.
saraleekritah visham seey pahale bhee aur bund honey seey pahale bhee khula
nimnalikhit ack aarekh haye joe summ/visham hapticity aur khule/bund π-ligand kii pratikriyashilta key rujhaanon koo darshaata haye.
dhaatu kaa kendra electron vaapas lena haye. yadi dhaatu koo carbonyl seey bhee jodaa jaataa haye tou yeh prabhaav badh jaataa haye. electron kharaab dhaatuen carbonyl key saath achchi tarah seey bandhan kaa samarthan naheen karati hain. dhaatu koo jitna adhik electron vaapas legaa, saha ligand mein utanaa hii adhik tihra bandhan charitra hoga. yeh ligand koo ack uchch bull sthiraank detaa haye. ack ligated carbonyl key liye paaya jaane vaalaa parinami bull sthiraank π ligand key liye samaan bull sthiraank kaa pratinidhitva kartaa haye yadi way ack hii parisar mein saha ligand koo pratisthaapit karate hain.
nucleophilic jodd taba naheen hotaa haye jaba kco * (saha ligand key liye prabhaavi bull sthiraank) ack seema moolya seey cumm hoe. 
nimnalikhit chitra ack carbonyl samooh seey judee ack ligated dhaatu koo darshaata haye. iss samooh mein aanshik sakaratmak avesh hotaa haye aur isaliye yeh nucleophilic hamale key prati atisamvedansheel hotaa haye. yadi l "n" dwara darshaaya gayaa ligand ack π-ligand thaa, tou yeh nucleophilic hamale kii or bhee sakriya hoga.
aaney vaalaa nucleophilic hamla neeche diye gaye chitra mein π-pranali key kissy ack chhor parr hotaa haih
iss udaaharan mein valay pranali koo 1,3-beautadine key samaan maanaa jaa sakata haye. green-davis-mingos niyamon kaa paalan karate hue, choonki beautadine summ hapticity kaa ack khula π-ligand haye, isaliye nucleophilic hamla π-system kii antim sthitiyon mein seey ack parr hoga. aisaa isaliye hotaa haye kyonki beautadine key lumo mein aantarik sthitiyon key bajaay siron parr badey khand hotey hain.
hamale key regiochemistry parr ligand key prakaron kaa prabhaav.
elil ligand kii antim sthiti parr nucleophilic hamla jaba π ligand koo sweekaar curr rhaa hotaa haye.
yadi sigma daan karane vaale ligand maujood hain tou way ligand mein electrons koo pump karate hain aur aantarik sthiti mein hamla hotaa haye.
asmamit ligand kaa prabhaav.
jaba asmamit elil ligand maujood hotey hain tou adhik pratisthaapit sthiti mein hamla hotaa haye.
iss mamle mein hamla carbon parr hoga aur donon aar samooh isase judey honge kyonki yeh adhik pratisthaapit sthiti haye.
sanshleshan mein upayog karein.
π ligand key nucleophilic jodd kaa upayog sanshleshan mein kiya jaa sakata haye. iska ack udaaharan chakreeya dhaatu yaugik banaana haye. nucleophile π ligand key kendra mein judate hain aur ack metalobutain kaa utpaadan karate hain.

