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 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.     

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 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.     

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

Summary The high field ¹H- and ¹³C-NMR (300 MHz and 75.5 MHz respectively) spectra of poly(2-vinyl selenophene) synthesized by free radical initiation have been recorded and analyzed. Both the ¹H- and ¹³C-NMR spectra of poly(2-vinyl selenophene) have many similarities to the corresponding poly-2- and 3-vinyl thiophene spectra and could, therefore, be interpreted in a like manner.     

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.     

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

Summary The title monomer was polymerized via free radical initiation. The polymerization proved very rapid, yielding quantitative conversion in 5–10 min. Most of the polymer proved to be insoluble in any solvent tried, but good quality ¹H-NMR and ¹³C-NMR spectra could be obtained from the soluble fraction. The soluble fraction of the polymer proved to have an atactic stereochemistry.     

Preliminary analysis of the 1H-NMR and 13C-NMR spectra of poly(2-vinylpyrazine)

Summary The title polymer was synthesized by free radical initiation. The ¹H-NMR and ¹³C-NMR spectra revealed several resonances that were sensitive to polymer stereosequence distribution. Analysis of these resonances showed that free radical initiated poly (2-vinyl pyrazine) is an atactic polymer, a result consistent with data accumulated for other poly vinylheterocycle initiated free radically.     

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.     

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.     

Copolymerization of 6-vinyl-1,4-benzodioxane with methyl methacrylate andn-butyl acrylate

Summary 6-Vinyl-1,4-benzodioxane was synthesized and its copolymerization with methyl methacrylate and n-butyl acrylate was investigated. In this work concentration ladder type copolymerizations were performed. The results of copolymerization were analyzed using a nonlinear least squares method and reactivity ratios were calculated from the analysis. The 6-vinyl-1,4-benzodioxane was found to be a more reactive monomer than either the methyl methacrylate or butyl acrylate, but only slightly so in the methyl methacrylate case.     

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(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.     

An analysis of the 13C-NMR spectrum of poly(N-vinyl-2-oxazolidone)

Summary N-Vinyl-2-oxazolidone monomer was synthesized and polymerized in bulk and in solution using a free radical initiator. The ¹³C-NMR spectra of these polymers were recorded and analyzed in terms of polymer stereochemistry. The carbonyl carbon was found to be sensitive to pentad stereosequences and the fractional and relative intensities of the signals in the carbonyl resonance pattern show that the polymers are atactic.     

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.     

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.     

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 1H-NMR and 12C-NMR spectra of poly(2-iodostyrene)

Summary The 300 MHz ¹H-NMR and 75.5 MHz ¹³C-NMR spectra of poly(2-iodostyrene) were recorded and analyzed in terms of polymer stereochemistry. The aromatic protons were insufficiently resolved for any reasonable peak assignments to be made, but the methine proton resonance could be interpreted in terms of a pentad stereosequence sensitivity. The analysis suggested poly(2-iodostyrene) was an atactic polymer. The ¹³C-NMR spectrum was somewhat better resolved and analysis supports the results from the ¹H-NMR i.e. poly(2-iodostyrene) is an atactic polymer.     

13C-NMR characterization of poly(1,5-hexadiene)

Poly(1,5-hexadiene) was prepared and its structure characterized by high-field ¹³C nuclear magnetic resonance. The polymer was shown to contain repeating five-membered rings separated by methylene bridges, with both cis and trans placements present in a 54 : 46 ratio. The result is compatible with the Marvel-Garrison two-step reaction mechanism.