title: Reactions of Some Cyclomanganated Compounds with C-Nitroso Compounds, Allenes, and Ketenimines

authors: Revell, John Bernard

subjects: cyclomanganated

abstract: eta2-(5-Methoxy-2-acetylphenyl)tetracarbonylmanganese (30) was reacted with 2-methyl-2-nitrosopropane (31) to form 2-acetyl-5-methoxy-N-(tert-butyl)aniline(43) in low yield. Attempts to improve the yield by varying the solvent were unsuccessful.
Substrate 30 was reacted with nitrosodurene and orthomanganated triphenylphosphine sulfide was reacted with 2-methyl-2-nitrosopropane (31), however no new compounds were characterised in either case.
Acetylallene (55) was reacted with 30. Electrospray ionisation-mass spectrometry(ESI-MS) provided evidence for the insertion of one and two molecules of 55 into the Mn-C bond of 30 to form the products tentatively identified as 56 and 57.
The reaction of orthomanganated triphenylphosphine sulfide with acetylallene was attempted but no new compounds were characterised.
In order to extend the study to ketenimines, the synthesis of the diphenylketene N-(p-tolyl)imine was attempted by the dehydration of N-(p-tolyl)diphenylacetamide under a variety of conditions, but it was not isolated in useful quantities. A single preliminary study of the reaction of diphenylketene N-(p-tolyl)imine with 30 gave an intense green solution, but no products were isolated.

text: Reactions of Some Cyclomanganated Compounds with C-Nitroso Compounds, Allenes, and Ketenimines eta2-(5-Methoxy-2-acetylphenyl)tetracarbonylmanganese (30) was reacted with 2-methyl-2-nitrosopropane (31) to form 2-acetyl-5-methoxy-N-(tert-butyl)aniline(43) in low yield. Attempts to improve the yield by varying the solvent were unsuccessful.
Substrate 30 was reacted with nitrosodurene and orthomanganated triphenylphosphine sulfide was reacted with 2-methyl-2-nitrosopropane (31), however no new compounds were characterised in either case.
Acetylallene (55) was reacted with 30. Electrospray ionisation-mass spectrometry(ESI-MS) provided evidence for the insertion of one and two molecules of 55 into the Mn-C bond of 30 to form the products tentatively identified as 56 and 57.
The reaction of orthomanganated triphenylphosphine sulfide with acetylallene was attempted but no new compounds were characterised.
In order to extend the study to ketenimines, the synthesis of the diphenylketene N-(p-tolyl)imine was attempted by the dehydration of N-(p-tolyl)diphenylacetamide under a variety of conditions, but it was not isolated in useful quantities. A single preliminary study of the reaction of diphenylketene N-(p-tolyl)imine with 30 gave an intense green solution, but no products were isolated.

year: 2008

title: Visualising and communicating population diversity through web maps

authors: Brabyn, Lars

subjects: Population web maps

abstract: An online New Zealand Atlas of Population Change (NZAPC) is being developed (http://socialatlas.waikato.ac.nz/) to communicate the interaction and associated diversity resulting from three important components of population change: migration, natural change (births minus deaths), and population ageing. A comparative evaluation is made between five prominent international population web maps that utilise automated map server technology and the NZAPC, which uses static maps designed collaboratively by a demographer and a cartographer. This evaluation combined the needs of demography, cartographic communication and human computer interaction, as well as consideration of software. Interactive online maps and graphics are a powerful medium for communicating population distribution and associated diversity, but care needs to be taken in the choice of data and their interpretation. The NZAPC differs from the other web map sites evaluated in that it is accompanied by supporting research and narrative. The design of the NZAPC has had extensive demographic and cartographic input so that users are provided with relevant and easy-to-understand maps and graphs. This is a different approach to mainstream population web mapping sites that provide access to large data sets and allow the user to dynamically construct their own maps. We argue that the provision of research-supported maps and graphs by experienced researchers has a rising place in online mapping. We provide examples from the NZAPC with a focus on assisting New Zealanders to better understand population change and thus prepare for, respond to and celebrate the increasingly diverse population of Aotearoa New Zealand.

text: Visualising and communicating population diversity through web maps An online New Zealand Atlas of Population Change (NZAPC) is being developed (http://socialatlas.waikato.ac.nz/) to communicate the interaction and associated diversity resulting from three important components of population change: migration, natural change (births minus deaths), and population ageing. A comparative evaluation is made between five prominent international population web maps that utilise automated map server technology and the NZAPC, which uses static maps designed collaboratively by a demographer and a cartographer. This evaluation combined the needs of demography, cartographic communication and human computer interaction, as well as consideration of software. Interactive online maps and graphics are a powerful medium for communicating population distribution and associated diversity, but care needs to be taken in the choice of data and their interpretation. The NZAPC differs from the other web map sites evaluated in that it is accompanied by supporting research and narrative. The design of the NZAPC has had extensive demographic and cartographic input so that users are provided with relevant and easy-to-understand maps and graphs. This is a different approach to mainstream population web mapping sites that provide access to large data sets and allow the user to dynamically construct their own maps. We argue that the provision of research-supported maps and graphs by experienced researchers has a rising place in online mapping. We provide examples from the NZAPC with a focus on assisting New Zealanders to better understand population change and thus prepare for, respond to and celebrate the increasingly diverse population of Aotearoa New Zealand.

year: 2019

title: Maori demography in Aotearoa New Zealand: Fifty Years on

authors: Kukutai, Tahu

abstract: Writing in the Journal of the Polynesian Society fifty years ago, budding demographer Ian Pool asked: “When is a Maori a ‘Maori’”? His assertion that cultural self-identification was the only credible way to define Māori collectively in official statistics was in stark contrast to the prevailing institutional practice of defining Māori by ‘degree of blood.’ In this article I use key insights from Ian’s paper to reflect on contemporary practices of demography, focusing specifically on the construction of Māori as a discrete population for demographic research, and the use of Māori ethnic identification as an independent variable. I conclude with some thoughts on how official statistics might be changed to better reflect the aspirations and needs of Māori in a post-settlement context.

text: Maori demography in Aotearoa New Zealand: Fifty Years on Writing in the Journal of the Polynesian Society fifty years ago, budding demographer Ian Pool asked: “When is a Maori a ‘Maori’”? His assertion that cultural self-identification was the only credible way to define Māori collectively in official statistics was in stark contrast to the prevailing institutional practice of defining Māori by ‘degree of blood.’ In this article I use key insights from Ian’s paper to reflect on contemporary practices of demography, focusing specifically on the construction of Māori as a discrete population for demographic research, and the use of Māori ethnic identification as an independent variable. I conclude with some thoughts on how official statistics might be changed to better reflect the aspirations and needs of Māori in a post-settlement context.

year: 2011