An analysis of the 1H- and 13C-NMR spectra of poly(3-bromostyrene)

Summary The 300 MHz ¹H-NMR spectrum of free radical initiated poly(3-bromostyrene) is similar to the ¹H-NMR spectra of certain poly(vinyl heterocycles) and can be interpreted in a like manner. The ¹³C-NMR is typical of spectra for meta-substituted polystyrenes, with some of the carbon resonances showing a sensitivity to polymer stereochemistry. The spectra indicate that poly(3-bromostyrene) synthesized by free radical initiation is an atactic polymer.     

Preliminary analysis of the 1H-NMR and 13C-NMR spectra of poly(4-acetoxystyrene)

Summary The title polymer was synthesized via free radical initiation. The ¹H- and ¹³C-NMR spectra of the polymer were recorded and analyzed in terms of polymer tacticity. Many resonances showed a multiplicity indicative of sensitivity to stereochemistry. Those resonances that could be analyzed with a reasonable degree of accuracy showed poly(4-acetoxystyrene) to be an atactic polymer.     

Preliminary analysis of the 1H- and 13C-NMR spectra of poly(3-vinyl-1-methylindole)

Summary The title monomer was synthesized and polymerized via free radical initiation. The high field ¹H- and ¹³C-NMR spectra were recorded and analyzed. Many resonances displayed multiplicities indicating a sensitivity to polymer stereochemistry but, in most cases, the resolution was insufficient for any reasonable interpretations to be made. The resonances that were well enough resolved for relatively accurate measurements to be made were analyzed in terms of polymer stereochemistry. The analysis suggests that poly(3-vinyl-1-methyl-indole) is an atactic polymer.     

Preliminary analysis of the 1H-NMR and 13C-NMR spectra of poly(2,5-dimethyl-3-vinylfuran)

Summary The title monomer was synthesized by dehydration of the corresponding alcohol. The monomer was polymerized under free radical conditions and H- and ¹³C-NMR spectra were recorded and analyzed. The spectra displayed several resonances with sensitivity to polymer stereochmistry and analysis of these resonances showed poly(2,5-dimethyl-3-furan) to be an atactic polymer.     

Analysis of the 1H-NMR and 13C-NMR spectra of poly(5-ethyl-2-vinyl thiophene)

Summary The title polymer was synthesized by free radical initiation. The ¹H-NMR and ¹³C-NMR spectra were recorded and analyzed in terms of polymer stereochemistry. By comparison of the results to those previously obtained, free radical initiated poly(5-ethyl-2-vinyl thiophene) was shown to be an atactic polymer.     

Preliminary analysis of the 300 MHz 1H-NMR spectrum of poly(5-chloro-2-vinylthiophene)

Summary The 300 MHz ¹H-NMR spectrum of free radical initiated poly(5-chloro-2-vinylthiophene) was obtained and analyzed. The spectrum was found to be similar to that of poly(2-vinylthiophene) and was interpreted in a like fashion. The spectrum was found to be consistent with that of a polymer having atactic stereochemistry.     

Analysis of the 1H-NMR and 13C-NMR spectra of poly(3-methyl-1-vinylpyrazole)

Summary The title monomer was polymerized in solution via free radical initiation. The polymer's 300 MHz ¹H-NMR and 75.5 MHz ¹³C-NMR spectra were recorded and analyzed in terms of polymer stereochemistry. Most of the resonances in both the ¹H-NMR and ¹³C-NMR spectra showed multiplicity consistent with sensitivity to polymer stereochemistry. However the ¹³C-NMR spectrum proved somewhat easier to interpret. The analysis of both the ¹H-NMR and ¹³C-NMR spectra very strongly indicate that poly(3-methyl-1-vinylpyrazole) is an atactic polymer.     

Preliminary analysis of the 1H-NMR and 13C-NMR spectra of poly(5-methoxy-2-vinyl thiophene)

Summary 5-Methoxy-2-vinylthiophene was synthesized from the corresponding aldehyde. The monomer was polymerized under free radical conditions using AIBN as the initiator. High field ¹H-NMR and ¹³C-NMR spectra of the polymer displayed several resonances that were sensitive to polymer stereochemistry. Analysis of these resonances showed that the polymer had an atactic sterochemistry.     

Analysis of the 1H-NMR and 13C-NMR spectra of poly(5-vinyl-2,2′-bithiophene)

Summary The title polymer was synthesized by free radical initiation in bulk and its ¹H-NMR and ¹³C-NMR spectra were recorded and analyzed in terms of polymer stereochemistry. The aliphatic region of the proton spectrum shows an unusual multiplicity due to stereochemical sensitivity and the resonances of several of the ring carbons displayed a sensitivity to higher order stereosequences. The analysis of these spectra showed that poly(5-vinyl-2,2-thiophene) is an atactic polymer.     

Copolymerization of N-vinyl phthalamide with acrylate and methacrylate monomers and preliminary analysis of the stereochemistry of poly(N-vinyl phthalamide)

Summary N-Vinyl phthalamide was copolymerized with methyl methacrylate, isobutyl methacrylate or butyl acrylate. The copolymerizations were initiated free radically and it was necessary to conduct the polymerizations in solution or else insoluble products would result. In most cases the polymerizations preceded to relatively high conversions in a short time. The conversions necessitated the use of high conversion methods to calculate the reactivity ratios. The N-vinyl phthalamide was found to be the less reactive monomer in all cases. As part of this study, poly(N-vinyl phthalamide) homopolymer was synthesized by free radical initiation. While the ¹H-NMR spectrum yield very little information concerning polymer stereochemistry, the methine carbon resonance in the ¹³C-NMR spectrum displayed a sensitivity to polymer stereochemistry.     

An analysis of the 300 MHz spectrum of poly(3-vinyl pyridine)

Summary 3-Vinyl pyridine was synthesized and the monomer was then polymerized employing free radical initiation. The 300 MHz ¹H-NMR spectrum was recorded and analyzed in terms of polymer stereochemistry. The results of the analysis strongly indicate that poly(3-vinyl pyridine) synthesized using free radical initiation is an atactic polymer.     

An analysis of the 1H- and 13C-NMR spectra of poly(6-vinyl-1,4-benzodioxane)

Summary The title monomer was synthesized from the corresponding aldehyde via a Wittig reaction. The monomer was polymerized using free radical initiation and its high field ¹H- and ¹³C-NMR spectra were recorded. When analyzed in terms of stereochemistry the spectra showed poly(6-vinyl-1,4-benzodioxane) is an atactic polymer when synthesized via free radical initiation.     

Analysis of the 13C-NMR and 1H-NMR spectra of poly(2,5-dimethyl-3-vinyl thiophene)

Summary The title monomer was synthesized and polymerized using free radical initiation. The polymerization was facile and proceeded rapidly to high conversion. The high field ¹³C-NMR and ¹H-NMR spectra of the polymer had several signals that displayed sensitivity to polymer stereochemistry. Analysis of these signals showed poly(2,5-dimethyl-3-vinyl thiophene) to be an atactic polymer.     

A preliminary analysis of the 1H-NMR and 13C-NMR spectra of poly(2-vinyl-5-methyl thiophene)

Summary Poly(2-vinyl-5-methyl thiophene) was synthesized via free radical initiation. The 300 MHz ¹H-NMR and 75.5 MHz ¹³C-NMR spectra were recorded and analyzed in terms of polymer stereochemistry. The spectra were similar to those of other poly(2-vinyl thiophenes) and were interpreted in a like fashion. The poly(2-vinyl-2-methyl thiophene) was found to be an atactic polymer.     

Preliminary analysis of the 1H-NMR and 13C-NMR spectra poly(2-vinyl-5-methyl furan)

Summary The title polymer was synthesized via thermal and AIBN initiation. The 300 MHz ¹H-NMR and 75.5 MHz ¹³C-NMR spectra were recorded and analyzed in terms of polymer stereochemistry. The ¹H-NMR was very similar to the ¹H-NMR spectra of poly(2- and 3-vinyl thiophene) and could be interpreted in a like manner. The analysis of the ¹H-NMR led to the conclusion that poly(2-vinyl-5-methyl furan) is an atactic polymer when synthesized under free radical conditions. Analysis of the ¹³C-NMR spectrum supported this conclusion.     

An analysis of the 1H-NMR and 13C-NMR spectra of poly(3-methyl-2-vinyl thiophene)

Summary The title polymer was synthesized by free radical initiation in bulk. The 300 MHz H-NMR and 75 MHz ¹³C-NMR spectra of the polymer were obtained at ambient temperature and analyzed in terms of stereochemistry. The H-NMR spectrum provides limited information but suggests that the polymer is atactic. Analysis of the more detailed ¹³C-NMR spectrum supports this result, i.e. poly(3-methyl-2-vinyl thiophene) is an atactic polymer.     

A preliminary analysis of the high field 13C-NMR and 1H-NMR spectra of poly(2-thienyl vinyl ketone)

Summary Poly(2-thienyl vinyl ketone) was synthesized via free radical initiation and its 300 H-NMR and 75.5 MHz ¹³C-NMR spectra were recorded and analyzed. The analysis showed that poly(2-thienyl vinyl ketone) is an atactic polymer.     

An analysis of the 1H- and 13C-NMR spectra of poly(5-vinyl-1,3-benzodioxole)

Summary The title monomer was synthesized and subsequently polymerized via free radical initiation. The high field ¹H-NMR and ¹³C-NMR spectra were recorded and analyzed in terms of polymer stereochemistry. the ¹H-NMR spectrum proved of limited value in this regard but the ¹³C-NMR spectrum yielded a good deal of useful information. Analysis of the spectra strongly indicated that poly(5-vinyl-1,3-benzodioxole) is an atactic polymer.     

Preliminary analysis of the 13C-NMR spectrum of poly(3-vinyl furan)

Summary Poly(3-vinyl furan) was synthesized in bulk by free radical initiation. The polymerization was quite sluggish with long polymerization times resulting in relatively low yields of product. The 75.5 MHz ¹³C-NMR spectrum could be analyzed in terms of stereochemistry even though signal/noise ratios were not optimum. The analysis indicates that poly(3-vinyl furan) (3VF), synthesized by free radical initiation, is an atactic polymer.     

Insertion of Cl-and CCl3-groups during the free radical initiated chain decomposition of 1,4-cis-polyisoprene in tetrachloromethane

Summary The free radical initiated chain decomposition of 1,4-cis-polyisoprene was carried out in ¹³C-enriched tetrachloromethane.Surprisingly, although the Cl-and CCl₃-radicals were simultaneously produced, it was almost entirely the Cl-radical that was built into the polymer.The detection was carried out by ¹³CNMR-spectroscopy and elementary analysis.Phosgene was detected as an oxidation product of tetrachloromethane.