The electron affinity of tungsten hexafluoride

Abstract

From the measured heat of hydrolysis of KWF, in alkaline hypochlorite (-123.6 f 2.6 kcal mol-l), the heat of formation of KWF,, the electron affinity of WF,, and the fluoride ion affinity of WF, are estimated to be -541 -f 3, 120 f 5, and 145 f 6 kcal mol-l respectively, at 25". electron affinities of PtF, (156), IrF, (135), OsF, (108) and Rep, (90 kcal mol-l), but so far these have not been confirmed quantitatively.The hydrolysis of W F ' , , by alkaline hypochlorite occufs quantitatively according to equation (1). KwF,(s) $-+ocl-(aq) + 70H-(aq) --fFEW electron affinities of compounds have been reported. K+(as) From the reactions of transition metal hexafluorides with oxidisable molecules such as O,, NO, and NO,, Bartlettl has made qualitative estimates of the minimum values of the A frangible glass bulb, containing a known mass of the compound, was broken into a solution of sodium hydroxide

Oxidising behaviour of molybdenum and tungsten hexafluorides

“…(v) and silver(1) hexafluorotungstate(v) demonstrating unambiguously that MoF, is the stronger oxidising agent. The difference in behaviour is consistent with recent esti-mates of the hexafluorides' electron affinities 2. The solvent properties of MeCN are crucial, for example in solvating Ag+ (ref.3) and Ag2+.…”

Feline infectious peritonitis and its differential diagnosis*

“…Feline infectious peritonitis, a transmissible serofibrinous peritonitis of cats, was first characterized as a separate disease entity in 1966 by Wolfe & Griesemer at Columbus, Ohio. I t has been recorded subsequently by a number of workers in North America (Disque, Case & Youngren, 1968;Ward & Pederson, 1969;Hardy & O'Reilly, 1969;Burgess, 1967;Ward, 1969), and recently the occurrence of an apparently identical disease has been reported in England (Ingram, 1970;Wilkinson, 1970). No doubt feline infectious peritonitis had been present in both the United States and this country prior to these descriptions of the specific condition as Smith & Jones (1961), Holzworth (1963, 1965 and Joshua (1965) refer to fibrinous or serofibrinous peritonitis cases in cats ofundetermined aetiology, and Ishmael & Howell (1968) found lesions on the capsule of the spleen of a cat which they considered might represent the disease.…”

Thermochemistry of hexafluoro-anions of M IV (M = Si, Ti, Mn, or Re) and lattice energy calculations for their salts

“…3) and A,[WBr,] (A = alkali metal or alkaline-earth metal). 4 If the compound in question is stable and inert at pH 7, but hydrolyses readily in acidic or alkaline media, then both enthalpies of solution and of hydrolysis are obtainable, e.g. I<,-[ReCl,] and related corn pound^.^>^ Enthalpies of solution and of hydrolysis are directly obtained quantities, but ion hydration enthalpies, electron affinities, and similar thermodynamic parameters are indirectly obtained via the use of lattice enthalpies.…”