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A petition to the President of the Executive Committee and members of Sigma XI by NPS members organized as a Club to establish a Chapter at the U.S. Naval Postgraduate School. Approved for public release; distribution is unlimited.

A Report to the Office of Naval Research on an investigation carried out under ONR Project Order No. NR051-350 http://archive.org/details/radiochemicalstu18rein NA NA

The article of record as published may be found at http://dx.doi.org/10.1021/ic50116a022 Upon treatment with excess aqueous HClO₄, Pd(NH₃)₄²⁺ is converted through four consecutive steps to Pd(OH₂)₄²⁺. Correlation of observed rate constants with actual mechanistic steps is based primarily on reconstruction of the absorption spectra of the intermediate species; it was thus found that the rate constants decrease steadily from one step to the next. At 50°, µ = 1, rate constants found are respectively 0.020, 0.008, 9.2 X 10ˉ³ and 2.2 X 10ˉ⁴ secˉ¹. Activation enthalpies range from 21 to 24 kcal/mol and activation entropies from +4 to -4 eu. Substituent effects are compared with those in chloride-containing complexes and with those for the reverse reactions. Office of Naval Research

The article of record as published may be found at http://dx.doi.org/10.1021/ic50048a013 Potentiometric and spectrophotometric studies have been made of the equilibria among several chloroammine complexes of Pd(II) in ammonium salt solutions at 25 and 30˚. For unit ionic strength at 25˚, equilibrium constants found potentiometrically for the substitution of one NH₃ by Clˉ are: in Pd(NH₃)₄²⁺, 6.1 X 10ˉ⁵; Pd(NH₃)₃CI⁺, 1.6 X 10ˉ⁴; Pd(NH₃)₂,CI₂, 1.9 X 10ˉ⁶. Aquation constants are, similarly: Pd(lNH₃)₃Cl⁺, 0.0010; Pd(NH₃)₂Cl₂, 0.0047. ΔH˚ for the substitution by Clˉ of each of the first two NH₃ molecules in Pd(NH₃)₄²⁺ is estimated as 10 kcal. Office of Naval Research

The article of record as published may be found at http://dx.doi.org/10.1021/ed043p382

The article of record as published may be found at http://dx.doi.org/10.1021/ic50091a014 Office of Naval Research

Solubilities have been determined at 25˚ for trans-Pd(NH₃)₂Cl₂ in solutions of NH₄NO₃, NH₄CI, and NaCl, in which media base hydrolysis is repressed. The data are interpreted in terms of the heterogeneous equilibrium involving the uncharged solute molecule and the homogeneous equilibrium for the first step of aquation, The concentration of neutral solute in the saturated solution is given as 9.5 X 10⁻⁴ M and the aquation equilibrium constant as 3.9 X 10⁻³. Office of Naval Research

Cis -dichlorodiamminepalladium(II) was synthesized and identified by its unique infrared spectrum. The reaction of cis -dichlorodiamminepalladium(II) with ammonia in varying concentrations of sodium chloride was studied using stopped-flow techniques. An analysis of the following system was completed and discussed in the light of experimental rate constants. http://archive.org/details/stoppedflowkinet1094517254 Lieutenant Commander, United States Navy Approved for public release; distribution is unlimited.

The following substitution reactions involving the square complexes of palladium (II) in aqueous HC1 solution were studied by spectrophotometric and potentiometric methods... http://archive.org/details/substitutionreac109459648 Lieutenant Commander, Royal Canadian Navy

The need for a correlation between the amount of a substance added to a composite plastic material and its effect on the cubical coefficient of thermal expansion, or cubit expansivity, of the composite mixture is discussed, experimental values for the cubic expansivities of several composite plastics made from a thermoplastic resin, an inert salt filler, and various percentages of aluminum are reported. Four hypothetical correlations are tested, two of which are reported to give calculated values within 1% of those observed. Apparatus and procedures for obtaining these results are also described in detail. http://archive.org/details/theeffectoflumin1094526511 Lieutenant, United States Navy Approved for public release; distribution is unlimited.

Solutions of tetraamminepalladium (II) perchlorate were made up and analyzed. The following acid hydrolysis reactions of tetraamminepalladium (II) ion were studied by ultraviolet spectroscopy. First order rate constants were evaluated for each step of the reaction series at various temperatures. Activation parameters were determined. (Equations) Mechanisms for the consecutive reactions are proposed, and cis and trans effects are discussed. http://archive.org/details/thekineticsofsuc1094515789 Ensign, United States Naval Reserve Approved for public release; distribution is unlimited.