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"Trimethylsilyl cyanide is the chemical compound with the formula (CH3)3SiCN. This volatile liquid consists of a cyanide group, that is CN, attached to a trimethylsilyl group. The molecule is used in organic synthesis as the equivalent of hydrogen cyanide. It is prepared by the reaction of lithium cyanide and trimethylsilyl chloride: :LiCN + (CH3)3SiCl -> (CH3)3SiCN + LiCl Structure The molecule exhibits the expected structure of a nitrile-like compound. The compound exists in a facile equilibrium with a small amount of the isomeric isocyanide (CH3)3SiNC. By contrast, the nearly isostructural tert-butyl nitrile does not readily isomerize to tert-butyl isocyanide. Reactions Trimethylsilyl cyanide hydrolyzes to give hydrogen cyanide and trimethylsilanol: :(CH3)3SiCN + H2O -> (CH3)3SiOH + HCN In its principal application, it adds across carbon-oxygen double bonds, for example in an aldehyde, to form a new carbon-carbon bond: : + (CH3)3SiC≡N -> N≡C-Si(CH3)3 The product is an O-silylated cyanohydrin. One use of this reagent is to convert pyridine-N-oxides into 2-cyanopyridine. This transformation is best done in dichloromethane solution using dimethylcarbamoyl chloride as the activating electrophile. It is possible to use benzoyl chloride but the yields and regioselectivity of the addition of the cyano group are lower. Safety This chemical is rated as "Fatal if swallowed, in contact with skin or if inhaled" as it hydrolyzes in the presence of moisture to give hydrogen cyanide gas. Disposal by using dilute solution of alkali hydroxide is recommended.MSDS of trimethylsilyl cyanide. (PDF). Gelest. [Jun 13, 2019] References Category:Nitriles Category:Trimethylsilyl compounds "
"Events from the year 1972 in Pakistan. Incumbents =Federal government= *President: Zulfikar Ali Bhutto *Chief Justice: Hamoodur Rahman Events * Karachi labour unrest of 1972 =January= * 20 January -President (later Prime minister Zulfikar Ali Bhutto publicly announces that Pakistan will immediately begin a nuclear weapons programme. =July= * 2 July – India and Pakistan sign the Simla Accord in Simla, India, following the surrender of the Pakistan military to Indian forces in 1971 and the subsequent emergence of former East Pakistan as the independent nation of Bangladesh. * 7 July – Sindh Assembly passed the Sind Teaching, Promotion and Use of Sindhi Language Bill, 1972 which established Sindhi language as the sole official language of the province resulting in 1972 Language violence in Sindh. =August= * 14 August – Pakistan celebrates 25 years as an independent nation. Births *26 April – Sana Nawaz, actress *5 August – Aaqib Javed, cricketer and coach *3 October – Aijaz Aslam, actor Deaths *28 May – Aziz ul Haq, Chairman of the Young People's Front, a Marxist group *29 May – Prithviraj Kapoor, actor and director *1 October – Riaz Shahid, film writer and director See also * 1971 in Pakistan * Other events of 1972 * 1973 in Pakistan * Timeline of Pakistani history Category:1972 in Asia "
"There are numerous Motorsports Hall of Fames: *Auto Racing Hall of Fame - United States *Canadian Motorsport Hall of Fame - Canada *International Motorsports Hall of Fame - autoracers from around the world *Motorcycle Hall of Fame - United States *Motorsports Hall of Fame of America - United States *NASCAR Hall of Fame - United States *National Dirt Late Model Hall of Fame - United States *National Midget Auto Racing Hall of Fame - United States *National Sprint Car Hall of Fame & Museum - United States *Off-road Motorsports Hall of Fame - off-road racers from around the world *SCCA Hall of Fame - Sports Car Club of America, United States See also *List of halls and walks of fame "