Addition compounds of n-methyl cyclic imines with trimethylboron,

A manometric investigation was made of the addition compounds of trimethylboron with the N-methyl derivatives of ethylenimine (aziridine), trimethylenimine (azetidine), pyrrolidine and piperidine. The stability order obtained was 3->4->5->6-membered ring. This order is different from that reported by and (1) for the trimethylboron addition compounds with the unsubstituted cyclic imines, the order being 4->5->6->3-membered ring. The complete reversal in position of the 3-membered ring upon substituting a methyl group for the hydrogen on the nitrogen in this series is due to large steric interaction. This effect becomes more pronounced as the ring size increases, thereby leading to the systematic decrease in stability. Only in the case of the 3-membered ring does methyl substitution result in a more stable addition compound. For the other ring compounds methyl substitution results in decreased stability, the decrease becoming progressively larger as the ring size increases.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/32378/1/0000453.pd

The impact of world heritage site designation on local communities - A case study of Ogimachi, Shirakawa-mura, Japan

The paper examines economic, socio-cultural, physical and attitudinal changes in/around World Heritage Site (WHS) Ogimachi since WHS designation from the local communities' standpoint and explores the background of these changes and views. Both positive and negative changes for local communities in/around WHS Ogimachi after WHS listing are identified. There are three main factors behind these changes: the extensive and rapid tourism development after WHS inscription; the high level of appeal of a WHS status for domestic tourists; and local people's attitudes towards conservation of the cultural environment and WHS status. In addition to its conservation plan, WHS Ogimachi must have a comprehensive tourism management plan for its successful future as a place to live, as a WHS and a tourist destination

Women and Men...Leading the Church Together?

2011/06/14. Discuss the benefits and challenges of women and men serving and leading the church together