Polymerisation of bis(trichlorophenolato)tri(pyridine)nickel(II) and bis(trihalophenolato)di(pyridine)nickel(II) complexes in solid state

Kisakürek, Duygu; Aslan, Ayhan; Isci, Huseyin

doi:10.1016/s0032-3861(99)00749-1

Cited by 14 publications

(23 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thermal behavior of the complexes was investigated by DSC measurements. Thermogram of cobalt and copper complexes showed the same thermal behaviors as sharp exothermic peak, which can be attributed to the new bond formation during polymerization, and an endothermic peak due to the melting of the residual complex [19]. A sharp exothermic peak at 132.5 o C and an endothermic peak at 184.5 o C observed in the thermogram of cobalt complex and an exothermic peak at 115.1 o C and an endothermic peak at 175.2 o C observed in the thermogram of copper complex.…”

mentioning

confidence: 82%

Synthesis, crystal structure and characterization of new transition metal compounds of bromophenols: Bis(2,4,6-tribromophenolato) di(N-methylimidazole)M(II) (M=Co, Cu)

Çamurlu

Yilmaz²,

Tatar

et al. 2005

Cryst. Res. Technol.

View full text Add to dashboard Cite

Bis(2,4,6-tribromophenolato)di(N-methyl imidazole)M(II), where M stands for cobalt and copper metals, was synthesized via reaction of the corresponding metal sulphate and 2,4,6-tribromophenolate in aqueous media in the presence of N-methyl imidazole and sodium hydroxide. Although various crystallization procedures were applied only cobalt complex was obtained as single crystals. The Co(II) ion has a distorted octahedral enviroment involving two O atoms and two N atoms of the Bis(2,4,6-tribromophenolato)di(N-methyl imidazole) ligand. Powder x-ray diffraction pattern of copper compound was used for cooper complex. For characterizations of complexes carbon, hydrogen and nitrogen elemental analysis, FTIR and UV spectroscopy, DSC thermal analysis and magnetic susceptibility measurements at room temperature were performed.

show abstract

mentioning

confidence: 82%

Synthesis, crystal structure and characterization of new transition metal compounds of bromophenols: Bis(2,4,6-tribromophenolato) di(N-methylimidazole)M(II) (M=Co, Cu)

Çamurlu

Yilmaz²,

Tatar

et al. 2005

Cryst. Res. Technol.

View full text Add to dashboard Cite

show abstract

“…Cu(TBP) 2 (NMIZ) 2 and Ni(TBP) 2 (NMIZ) 2 seem to be less affected than Co(TBP) 2 (NMIZ) 2 , with the variation of decomposition time (Figure 7). Bis(2,4,6-tribromophenolato)di(pyridine)Co(II) and Bis(2,4,6-tribromophenolato)di(pyridine)Ni(II) complexes (20,21) resulted in higher percent conversion than their NMIZ counterparts of the current study Co(TBP) 2 (NMIZ) 2 and Ni(TBP) 2 (NMIZ) 2 , respectively. This observation could be explained on the basis of MS results of the previous studies, where the gaseous product was found to be mainly of ligand pyridine which does not lead to a reduction in the phenol content.…”

mentioning

confidence: 47%

Poly(dibromophenylene oxide)s Through Atom Transfer Radical Rearrangement Polymerization of Various Transition Metal Complexes

Çamurlu

Kisakürek

2009

Journal of Macromolecular Science, Part A

View full text Add to dashboard Cite

In this study, the synthesis of poly(dibromophenylene oxide)s were achieved via atom transfer radical rearrangement polymerization through decomposition of Bis(2,4,6-tribromophenolato)di(N-methyl imidazole)Cu(II)-Cu(TBP) 2 (NMIZ) 2 , Bis(2,4,6-tribromophenolato)di(N-methyl imidazole)Co(II)-Co(TBP) 2 (NMIZ) 2 , Bis(2,4,6-tribromophenolato)di(N-methyl imidazole)Ni(II)-Ni(TBP) 2 (NMIZ) 2 complexes. Polymerizations were carried out under two different conditions to investigate the effect of time and temperature on percent conversions, intrinsic viscosities. Characterizations of the polymers were performed by FTIR, DSC, 1 H-NMR, 13 C-NMR, SEM and viscometric measurements. The poly(dibromophenylene oxides)s, synthesized by the transition metal complexes, having nonchelating ligand N-methyl imidazole, displayed selectivity in the favor of 1-2 and 1-4 additions, taking place at equal rates irrespective of the type of the metal used. Among the synthesized polymers, the highest percent conversion and intrinsic viscosity was achieved by the decomposition of Cu(TBP) 2 (NMIZ) 2 complex, whereas, Ni(TBP) 2 (NMIZ) 2 yielded the lowest. Investigation of the complexes via mass spectroscopy and the thermal behavior of the by-products enlightened the underlying reasons of the variations at percent conversion and intrinsic viscosity values of the resultant polymeric products.

show abstract

“…5; (I), (II), and (III) for polymers, P1 (C1), P2 (C2), and P4 (C4), respectively]. Within the three possible structures of the TCPH, 13 C-NMR shift data calculations showed that for P1, P2, and P4 correlated well with the structures (b) or (c) (Fig. 5).…”

Section: Effect Of Nmiz and Dmpz Ligands 1081mentioning

confidence: 60%

“…Initially, silver and copper, [11] recently, cobalt, [12] nickel, [13] manganese, [14] zinc, [15] and cerium [16] were the mainly used transition metals in the synthesis of the complexes. The proposed reaction was:…”

Section: Introductionmentioning

confidence: 99%

Effect ofN‐Methyl Imidazole and Dimethyl Pyrazole Ligands on Polymerization of di(2,4,6‐Trichlorophenolato)Cu(II)/Co(II) Complexes in Solid State

Baştürkmen

Kisakürek

2004

Journal of Macromolecular Science, Part A

View full text Add to dashboard Cite

Polymerization of 2,4,6-trichlorophenol (TCPH) was achieved through the thermal decomposition of the copper and cobalt complexes of TCPH with N-containing ligands [N-methyl imidazole (NMIz) and 3,5-dimethyl pyrazole (DMPz)]. The structural analysis of the complexes was performed by using Fourier transform infrared (FTIR), differential scanning calorimetry (DSC), mass (MS), UV-VIS, diffuse reflectance (DRS) and electron spin resonance (ESR) spectroscopies, magnetic susceptibility balance and elemental analyses. Polymerization was achieved either in solid state or in melt, and the polymers were characterized by FTIR, nuclear magnetic resonance (NMR) spectroscopy, DSC, and viscosity measurements. The effects of the temperature and time dependencies of %Conversion on polymer synthesis were investigated. The cobalt complexes (having higher decomposition temperatures) were more stable than copper complexes (decomposing at lower temperatures). Thermal stability with respect to N-ligand shows that the complexes with NMIz are more stable than DMPz complexes of the same metal. The highest molecular weights (M w ) were achieved at the end of 3 hr of polymerization for C1 at 1708C, C2 at 1208C, and C4 at 1508C. The longer time at lowest conversion leads to highest M w of C1 at 1258C at the end of 24 hr, C2 at 908C at the end of 72 hr and at 1008C at the end of 48 hr.The M w of the polymeric products range between 8.5 Â 10 3 and 6.5 Â 10 4 . All polymers are rigid and have branched structures.

show abstract

Polymerisation of bis(trichlorophenolato)tri(pyridine)nickel(II) and bis(trihalophenolato)di(pyridine)nickel(II) complexes in solid state

Cited by 14 publications

References 22 publications

Synthesis, crystal structure and characterization of new transition metal compounds of bromophenols: Bis(2,4,6-tribromophenolato) di(N-methylimidazole)M(II) (M=Co, Cu)

Synthesis, crystal structure and characterization of new transition metal compounds of bromophenols: Bis(2,4,6-tribromophenolato) di(N-methylimidazole)M(II) (M=Co, Cu)

Poly(dibromophenylene oxide)s Through Atom Transfer Radical Rearrangement Polymerization of Various Transition Metal Complexes

Effect ofN‐Methyl Imidazole and Dimethyl Pyrazole Ligands on Polymerization of di(2,4,6‐Trichlorophenolato)Cu(II)/Co(II) Complexes in Solid State

Contact Info

Product

Resources

About