title: Syntheses and molecular structures of some compounds containing many-atom chains end-capped by tricobalt carbonyl clusters

authors: Bruce, Michael I.

subjects: cobalt cluster

abstract: Several complexes containing Co₃ carbonyl clusters end-capping carbon chains of various lengths are described. Pd(0)/Cu(I)-catalysed reactions between {Co₃{μ₃-C(Ctriple bond; length of mdashC)₂Au(PPh₃)}(μ-dppm)(CO)₇ and I(Ctriple bond; length of mdashC)₂SiMe₃ or FcCtriple bond; length of mdashCI gave {Co₃{μ₃-C(Ctriple bond; length of mdashC)xR}(μ-dppm)(CO)₇ [x = 4, R = SiMe₃3; x = 3, R = Fc 8]; treatment of 3 with NaOMe and AuCl(PPh₃) gave 4 [x = 4, R = Au(PPh3)]. Related preparations of Co₃{μ₃-C(Ctriple bond; length of mdashC)₂[Ru(PP)Cp′]}(μ-dppm)n(CO)9−2n [PP = (PPh₃)₂, Cp’ = Cp, n = 1, 5; PP = dppe, Cp′ = Cp∗, n = 1, 6; 0, 7] are also described. Syntheses of bis-cluster complexes {Co₃(μ-dppm)(CO)₇}₂(μ-Cx) (x = 14, 12; 16, 9; 18, 11; 26, 10) – the latter being the longest cluster-capped Cx chains so far described – and the mercury-bridged compounds Hg{(Ctriple bond; length of mdashC)xC[Co₃(μ-dppm)(CO)₇]}₂ (x = 1, 13; 2, 14) are reported. The molecular structures of 7, 12, 13 and 14, as well as of Co₃(μ₃-CCtriple bond; length of mdashCSiMe₃)(μ-dppm)(CO)₆(PPh₃) (15) and Co₃{μ₃-CC(O)OEt}(μ-dppm)(CO)₇ (16), are reported.

text: Syntheses and molecular structures of some compounds containing many-atom chains end-capped by tricobalt carbonyl clusters Several complexes containing Co₃ carbonyl clusters end-capping carbon chains of various lengths are described. Pd(0)/Cu(I)-catalysed reactions between {Co₃{μ₃-C(Ctriple bond; length of mdashC)₂Au(PPh₃)}(μ-dppm)(CO)₇ and I(Ctriple bond; length of mdashC)₂SiMe₃ or FcCtriple bond; length of mdashCI gave {Co₃{μ₃-C(Ctriple bond; length of mdashC)xR}(μ-dppm)(CO)₇ [x = 4, R = SiMe₃3; x = 3, R = Fc 8]; treatment of 3 with NaOMe and AuCl(PPh₃) gave 4 [x = 4, R = Au(PPh3)]. Related preparations of Co₃{μ₃-C(Ctriple bond; length of mdashC)₂[Ru(PP)Cp′]}(μ-dppm)n(CO)9−2n [PP = (PPh₃)₂, Cp’ = Cp, n = 1, 5; PP = dppe, Cp′ = Cp∗, n = 1, 6; 0, 7] are also described. Syntheses of bis-cluster complexes {Co₃(μ-dppm)(CO)₇}₂(μ-Cx) (x = 14, 12; 16, 9; 18, 11; 26, 10) – the latter being the longest cluster-capped Cx chains so far described – and the mercury-bridged compounds Hg{(Ctriple bond; length of mdashC)xC[Co₃(μ-dppm)(CO)₇]}₂ (x = 1, 13; 2, 14) are reported. The molecular structures of 7, 12, 13 and 14, as well as of Co₃(μ₃-CCtriple bond; length of mdashCSiMe₃)(μ-dppm)(CO)₆(PPh₃) (15) and Co₃{μ₃-CC(O)OEt}(μ-dppm)(CO)₇ (16), are reported.

year: 2008

title: On the use of mobile tools in everyday life

authors: Pascoe, Jason

subjects: computer science

abstract: This paper explores how mobile tools are used in everyday life and investigates the issues surrounding their usage, or indeed, their lack of usage. Personal computers support us in a wide range of our desk-bound activities, but there is still relatively little use of computer-based tools in other parts of our day-to-day lives. We hypothesise that this is because certain barriers-to-use exist that discourage their use in everyday environments, namely that the tools are not readily to hand at the time of need and/or that they distract the user's attention too much from the surrounding environment or main task at hand.
We briefly present our concept of a Smartwatch -- a wrist-worn form of a general-purpose wearable computer -- that aims to overcome these barriers. However, we strongly believe that a prerequisite to the successful development of this, and other types of mobile devices, is a better understanding of the use, or disuse, of mobile tools in everyday life (including traditional and paper-based solutions). To gain this understanding we conducted a diary study in which a group of twelve volunteers recorded their usage of mobile tools over a period of 2 days. With the large volume of data that was collected we performed a qualitative analysis based on grounded theory techniques, resulting in a comprehensive and detailed picture of the use of mobile tools in everyday life. From this understanding we have drawn out nine key themes which we present in some detail in this paper, including: situational versus portability strategies, the mobility of information, new behaviours derived from mobile phone usage, the importance of creative expression, concern over privacy and security issues, and the demonstrated existence of the barriers-to-use.

text: On the use of mobile tools in everyday life This paper explores how mobile tools are used in everyday life and investigates the issues surrounding their usage, or indeed, their lack of usage. Personal computers support us in a wide range of our desk-bound activities, but there is still relatively little use of computer-based tools in other parts of our day-to-day lives. We hypothesise that this is because certain barriers-to-use exist that discourage their use in everyday environments, namely that the tools are not readily to hand at the time of need and/or that they distract the user's attention too much from the surrounding environment or main task at hand.
We briefly present our concept of a Smartwatch -- a wrist-worn form of a general-purpose wearable computer -- that aims to overcome these barriers. However, we strongly believe that a prerequisite to the successful development of this, and other types of mobile devices, is a better understanding of the use, or disuse, of mobile tools in everyday life (including traditional and paper-based solutions). To gain this understanding we conducted a diary study in which a group of twelve volunteers recorded their usage of mobile tools over a period of 2 days. With the large volume of data that was collected we performed a qualitative analysis based on grounded theory techniques, resulting in a comprehensive and detailed picture of the use of mobile tools in everyday life. From this understanding we have drawn out nine key themes which we present in some detail in this paper, including: situational versus portability strategies, the mobility of information, new behaviours derived from mobile phone usage, the importance of creative expression, concern over privacy and security issues, and the demonstrated existence of the barriers-to-use.

year: 2007

title: Green or grey pandemic recovery? Revealing the blue–green infrastructure influences in Aotearoa-New Zealand’s “Shovel Ready” Covid-19 response

authors: Hanna, Christina Jane

abstract: This paper analyses Aotearoa-New Zealand’s “shovel-ready fund” to assess if, and how, blue–green infrastructure systems were present in bids from its largest city regions. Findings indicate a greater prevalence in areas with existing spatial plans, and while there was some consideration of climate resilience, there was no real acknowledgement of the pandemic or human health. More positively, there was some evidence of unique indigenous influences that have potential to develop more inclusive and holistic blue–green infrastructure initiatives. The overall response, however, demonstrates a disjointed approach to blue–green infrastructure-related projects, and a missed opportunity for a more transformative response to the climate crisis and human health emergencies.

text: Green or grey pandemic recovery? Revealing the blue–green infrastructure influences in Aotearoa-New Zealand’s “Shovel Ready” Covid-19 response This paper analyses Aotearoa-New Zealand’s “shovel-ready fund” to assess if, and how, blue–green infrastructure systems were present in bids from its largest city regions. Findings indicate a greater prevalence in areas with existing spatial plans, and while there was some consideration of climate resilience, there was no real acknowledgement of the pandemic or human health. More positively, there was some evidence of unique indigenous influences that have potential to develop more inclusive and holistic blue–green infrastructure initiatives. The overall response, however, demonstrates a disjointed approach to blue–green infrastructure-related projects, and a missed opportunity for a more transformative response to the climate crisis and human health emergencies.

year: 2022