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Phosphonium ion Structure of PH + 4, the parent phosphonium cation. In chemistry, the term phosphonium (more obscurely: phosphinium) describes polyatomic cations with the chemical formula PR + 4 (where R is a hydrogen or an alkyl, aryl, organyl or halogen group). These cations have tetrahedral structures.
According to X-ray crystallography, [(i-Pr 2 N) 2 P] + is nearly planar consistent with sp 2-hybridized phosphorus center. [6] The planarity of the nitrogen center is consistent with the resonance of the lone pair of the nitrogen atom as a pi bond to the empty phosphorus 3p orbital perpendicular to the N−P−N plane.
Tetraphenylphosphonium chloride is the chemical compound with the formula [(C 6 H 5) 4 P]Cl, abbreviated Ph 4 PCl or PPh 4 Cl or [PPh 4]Cl, where Ph stands for phenyl. Tetraphenylphosphonium and especially tetraphenylarsonium salts were formerly of interest in gravimetric analysis of perchlorate and related oxyanions.
Phosphonium iodide is a powerful substitution reagent in organic chemistry; for example, it can convert a pyrilium into a phosphinine via substitution. [3] In 1951, Glenn Halstead Brown found that PH 4 I reacts with acetyl chloride to produce an unknown phosphine derivative, possibly CH 3 C(=PH)PH 2 ·HI .
Originally a division of Memphis-based wholesale grocer Malone & Hyde, the company was known as Auto Shack. After the sale of the grocery operation to the Fleming Companies of Oklahoma City, Oklahoma, the name of the company was changed to AutoZone to better reflect the company focus just prior to the company going public.
There are 206 current NOCs (National Olympic Committees) within the Olympic Movement.The following tables show the currently used code for each NOC and any different codes used in past Games, per the official reports from those Games.
ACDelco is an American automotive parts brand owned by General Motors (manufactured by GM are consolidated under the ACDelco brand, which also offers aftermarket parts for non-GM vehicles.
Tetrakis(hydroxymethyl)phosphonium chloride (THPC) is an organophosphorus compound with the chemical formula [P(CH 2 OH) 4]Cl. It is a white water-soluble salt with applications as a precursor to fire-retardant materials [ 1 ] and as a microbiocide in commercial and industrial water systems.