In this research, the insertion reaction of 2-alkyle dimethyl acetylene carboxylate and 2-hexyne in Pd-C bond of phosphorus ylide ortho palladate was investigated. Reaction of cyclopalladate [Pd(Cl)(X)PhY] with alkyne MeCO2CCCO2Me in CH2Cl2 produced [PdC(CO2Me)=C (CO2Me)(Cl)(PhY)X], (x= 2,4,6-Me3Py (1a), 4 Me.Py (1b)). Reaction of palladate [Pd(Cl)(NO2Y)(4-MePy)] with MeCO2CCCO2Me produced [PdC(CO2Me)=C(CO2Me)(Cl)(NO2Y)(4-MePy)](2). Reaction of [Pd(µ-Cl)(NO2Y]2 with MeCO2CCCO2Me at reflux temperature for 4 h, produced [PdC(CO2Me)=C(CO2Me)(µ-Cl)(NO2Y)]2 (3). Reaction of this compound with Me3Py and py gave [PdC(CO2Me)=C (CO2Me) (Cl) [NO2Y]X], (X= Me3Py (4a), Py(4b)). Dinuclear cyclo palladate compound [pd (µ-Cl)[NO2Y)]2 was refluxed with 2-hexyne and final product of this reaction was [Pd (Me)C=C (CH2CH2CH3)(µ-Cl)(NO2Y)]2 (5). Mixing reaction of this compound with PPh3, Pyand 2,4,6-Me3Py, gave one nuclear cyclo palladated compound with [Pd(CH3)C=C(CH2)2CH3(Cl)(NO2y)(x)], (x= Py(6a),PPh3(6b), 2,4,6-Me3Py(6c) ). The FT-IR spectra of (1- 4) show a strong absorption in the 1621- 1729 cm-1 range (see table1) which correspond to the ?co absorption of ylide carbonyl group and the inserted alkyne. In 1H NMR spectra of 1a , 1 in 2. ppm - 3.9 ppm, signals have been seen which are related to the OMe inserted alkyne, are appeared which is an emphasis on the insertion. The signal at 1.5 ppm is related to the inserted protons of picoline. signal for the PCH group compared to the free Ylide is located in a lower field which is due to the change of sp2 hybrid to sp3.In 1H NMR spectra of complex 2 at 2.6- 3.8 ppm hydrogen of methoxy are seen which shows the acetylene insertion. Ylide proton is appeared in an upper field compared to primary complex. In 1H NMR spectrum of complex 3, hydrogen of methoxy at 1.5 ppm and 3.8 ppm is appeared uniquely and quadra polar effect is not detected due to the chlorine exit from plate. In 1H NMR spectra of complex 4a, hydrogen of picoline peaks are seen perfectly that shows the successful nucleophilic attack to dimmer complex. In 1H NMR spectra of complex 4b, hydrogen of methoxy peaks are appeared broadly at 1.5- 3.9 ppm.Ylide CH shows two peaks at 4.8 ppm and 4.9 ppm that shows two major and minor isomers of A and B. In 1H NMR spectra of complex 5, aliphatic region is seen clearly which confirms the insertion action of 2-hexyne. The 1H NMR spectra of complex 6a shows two peaks at 4.79 ppm and 4.92 ppm which is related to ylide proton that confirm the existence of an isomer. Aliphatic region also at 0.88- 1.69 ppm are broadly appeared due to the largeness of the ring and the pressure on the ring. In 1H NMR spectra of complex 6b, aliphatic region at 0.88¬ 2.17ppm are appeared. The 1H NMR spectrum of complex 6c is seen at 4.92 ppm, two peaks related to ylide CH which shows the existence of an isomer. The Aliphatic region related to the inserted 2-hexyne is appeared at around 0.877- 1.5 ppm . In 31P-{1H} NMR spectra of complex 1a , 1b , 2 and 3, there appears to be one peak that justifies the complex with presence of single isomer.The 31P-{1H} NMR spectra of complex 4a shows two peaks at 22.268 ppm and 23.814 ppm that shows the presence of the migration of pyridine and chlorine group. The 31P-{1H} NMR spectra of complex 4b show two group of peaks which confirms the existence of isomer. Considering that ylide carbon is connected to chiral phosphorus, complex A could exist in form of R,S and complex B could exist in form of S,R and as a result the spectra is seen in four peaks at 19.64 ppm, 19.863 ppm, 22.186 ppm and 23.771 ppm. The The 31P-{1H} NMR spectra of complex 6a shows three close peaks and one peak at 30.877 ppm which considering the 1H NMR spectra, three peaks are related to four isomeric complex that two isomeric are related to the different insertion of 2-hexyne in Pd-C link and two isomeric due to the existence of chiral center which again due to the closeness of peaks three peaks are seen instead of four peaks. In 31P-{1H} NMR spectra of complex 6b, four series of peaks are discovered which the reason of formation of these isomerics is the insertion form of 2-hexyne in Pd-C link. The 31P-{1H} NMR spectra of complex 6c shows three peaks which regarding the 1H NMR spectra, this complex, that shows the isomerics, is supposed to show four peaks, but due to the too much closeness of peaks, two peaks are located on each other so instead of four peaks three peaks have been seen.