96.1 Star FM
96.1 Star FM (ACMA callsign: 5SEF) is an Australian commercial radio station based in Mount Gambier, South Australia, owned by Southern Cross Austereo. It commenced broadcasting on May 16, 1998. Currently, the only local program broadcast on the station is the Jess and Ryan breakfast show from 6am to 9am Monday to Friday - all other programming is broadcast from Albury or Gold Coast.
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Selenium hexafluoride
Selenium hexafluoride is the inorganic compound with the formula SeF6. It is a colourless gas described as having a "repulsive" odor. It is not widely encountered and has no commercial applications.
Structure, preparation, and reactions
Like many compounds of selenium, SeF6 is hypervalent. The compound has octahedral molecular geometry with Se-F bond length 168.8 pm.
SeF6 can be prepared from the elements or by the reaction of bromine trifluoride (BrF3) with selenium dioxide. The crude product is purified by sublimation.
The relative reactivity of the hexafluorides of S, Se, and Te follows the order TeF6 > SeF6 > SF6, the latter being completely inert toward hydrolysis until high temperatures. SeF6 also resists hydrolysis. The gas can be passed through 10% NaOH or KOH without change, but reacts with gaseous ammonia at 200 °C.
Safety
Although selenium hexafluoride is quite inert and slow to hydrolyze, it is toxic even at low concentrations, especially by longer exposure. In the U.S., OSHA and ACGIH standards for selenium hexafluoride exposure is an upper limit of 0.05 ppm in air averaged over an eight-hour work shift. Additionally, selenium hexafluoride is designated as IDLH chemical with a maximum allowed exposure limit of 2 ppm.
Selenium tetrafluoride
Selenium tetrafluoride (SeF4) is an inorganic compound. It is a colourless liquid that reacts readily with water. It can be used as a fluorinating reagent in organic syntheses (fluorination of alcohols, carboxylic acids or carbonyl compounds) and has advantages over sulfur tetrafluoride in that milder conditions can be employed and it is a liquid rather than a gas.
Synthesis
The first reported synthesis of selenium tetrafluoride was by Paul Lebeau in 1907, who treated selenium with fluorine:
A synthesis involving more easily handled reagents entails the fluorination of selenium dioxide with sulfur tetrafluoride:
An intermediate in this reaction is seleninyl fluoride (SeOF2).
Other methods of preparation include fluorinating elemental selenium with chlorine trifluoride:
Structure and bonding
Selenium in SeF4 has an oxidation state of +4. Its shape in the gaseous phase is similar to that of SF4, having a see-saw shape. VSEPR theory predicts a pseudo-trigonal pyramidal disposition of the five electron pairs around the selenium atom. The axial Se-F bonds are 177 pm with an F-Se-F bond angle of 169.2°. The two other fluorine atoms are attached by shorter bonds (168 pm), with an F-Se-F bond angle of 100.6°. In solution at low concentrations this monomeric structure predominates, but at higher concentrations evidence suggests weak association between SeF4 molecules leading to a distorted octahedral coordination around the selenium atom. In the solid the selenium center also has a distorted octahedral environment.
Zou
Zou or ZOU may refer to
See also
Zou (TV series)
Zou is a French animated children's television series inspired by the books of Michel Gay made by the Cyber Group Studios. It is broadcast by Disney Junior (UK & Ireland), Disney Junior (Portugal), Disney Junior (Latin America), and PBS Kids Sprout as well as NBC Kids (United States). It has also been made available on Hulu, to members of the site's Hulu Plus paid model. The series of episodes, lasting 10 minutes each, are transmitted two at a time, the second immediately after the first one, except on PBS Kids Sprout, where the episodes are shown individually. The characters include Zou, Elzee, Mum, Dad, Grandma, Grandpa, Nana, Mr Zoey, Zinnia, Zac and Elzee's mum.
Premise and format
Zou is about the day-to-day life and adventures of a young anthropomorphic zebra, Zou (Bizou), and his family and friends. Most episodes contain Zou's name in the title and usually take place at Zou's house or in his backyard. Zou lives with his mother, father, grandparents, and great-grandmother. Each episode features some simple problem or issue that Zou must deal with, usually with the assistance of his family and friends.
Zou (state)
Zou (simplified Chinese: 邹; traditional Chinese: 鄒), originally Zhu (邾) or Zhulou (邾婁), was a minor state that existed during the Zhou Dynasty of ancient China.
History
King Wu of Zhou granted Cao Xie (曹挾), an alleged descendant of the Yellow Emperor through his grandson, the legendary emperor Zhuanxu, control of the small state of Zhu as a vassal ruler under the State of Lu with the feudal title Viscount (子), but later holding the title Duke of Zhu (邾公). The ancestral surname of the ruling family was Cao (曹).
Zhu subsequently changed its name to Zou. The state of Zou was located in the southwest of modern-day Shandong Province. Its territory is now the county-level city of Zoucheng.
Demise
Zou was conquered and annexed by the state of Chu during the reign of King Xuan of Chu (r. 369–340 BC). The ruling family and its descendants adopted the Zhu (朱) surname in memory of their former state of Zhu (邾).
Legacy
Zhu is one of the most common surnames of modern-day China.
The noted Neo-Confucian Zhu Xi descends from the ruling house. The small state of Zou, however, is most famous as the birthplace of the Chinese philosopher Mencius. As the overlord State of Lu was the home state of Confucius and many of his disciples, this means that Confucianism's founder, and most of its minor sages and wise men hailed from or had ancestral roots in these two ancient states of China.
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