title: Rediscovering Arsenoacetic Acid

authors: Wilson, Peter Stanley

subjects: arsenoacetic acid

abstract: Arsonoacetic acid, H₂O₃As¹CH₂COOH, and arsenoacetic acid, punitively [AsVCH₂COOH]₂ have been synthesised according to historical literature methods, and have been characterised using modern techniques. Arsonoacetic acid was shown by an X-ray crystal structure analysis to be a molecular species with an extensive hydrogen bonding network in the crystal. Arsenoacetic acid proved to be more enigmatic. Electrospray mass spectra suggested it consisted of a mixtures of rings (RAs)n, n = 3-11, with n = 6 dominating. This was partly confirmed by a crystal structure of (AsCH₂COOH)₆ (as the pyridine solvate). On the other hand, ¹H and ¹³C NMR gave spectra that indicated only a single component for arsenoacetic acid. The formation of crystals of the high temperature phase of elemental sulfur, β-S8, at ambient temperature is also discussed.

text: Rediscovering Arsenoacetic Acid Arsonoacetic acid, H₂O₃As¹CH₂COOH, and arsenoacetic acid, punitively [AsVCH₂COOH]₂ have been synthesised according to historical literature methods, and have been characterised using modern techniques. Arsonoacetic acid was shown by an X-ray crystal structure analysis to be a molecular species with an extensive hydrogen bonding network in the crystal. Arsenoacetic acid proved to be more enigmatic. Electrospray mass spectra suggested it consisted of a mixtures of rings (RAs)n, n = 3-11, with n = 6 dominating. This was partly confirmed by a crystal structure of (AsCH₂COOH)₆ (as the pyridine solvate). On the other hand, ¹H and ¹³C NMR gave spectra that indicated only a single component for arsenoacetic acid. The formation of crystals of the high temperature phase of elemental sulfur, β-S8, at ambient temperature is also discussed.

year: 2009

title: A search for tradition & a search for a language [Review]

authors: Lodge, Martin

abstract: This article reviews the book "A Search for Tradition and A Search for a Language", by Douglas Lilburn.

text: A search for tradition & a search for a language [Review] This article reviews the book "A Search for Tradition and A Search for a Language", by Douglas Lilburn.

year: 2016

title: Rumours of gold at Te Aroha

authors: Hart, Philip

abstract: From the time of the opening of the Thames goldfield, miners were tormented by the belief that the best gold would be found in Te Aroha mountain, on their southern horizon - so near and yet so far because of Maori resistance to prospecting that district. Some Maori claimed to have found gold there, and visiting Pakeha from at least the 1850s onwards detected gold in the vicinity. The first time gold in the Waiorongomai valley was noted was in 1868. Several prospectors claimed to have explored the district, illegally and, potentially, dangerously, especially after Ohinemuri was opened to mining in 1875. But not until Hone Werahiko found gold in 1880 and the field was officially opened on 25 November would it be possible to prove whether a payable goldfield existed.

text: Rumours of gold at Te Aroha From the time of the opening of the Thames goldfield, miners were tormented by the belief that the best gold would be found in Te Aroha mountain, on their southern horizon - so near and yet so far because of Maori resistance to prospecting that district. Some Maori claimed to have found gold there, and visiting Pakeha from at least the 1850s onwards detected gold in the vicinity. The first time gold in the Waiorongomai valley was noted was in 1868. Several prospectors claimed to have explored the district, illegally and, potentially, dangerously, especially after Ohinemuri was opened to mining in 1875. But not until Hone Werahiko found gold in 1880 and the field was officially opened on 25 November would it be possible to prove whether a payable goldfield existed.

year: 2016