READ ME This text describes the data presented in the paper: ======================== Introductory information ======================== Files included in the data deposit (include a short description of what data are contained): 1)pH,power and temperature data along with calculated HI concentrations for reactions conducted at 30 Celcius with 0-40% water. 2)pH and HI concentration data at 30 Celcius with 0-40% water. 3) Explain the relationship between multiple data sets, if required: The calculated HI concentrations in data set 1 are based on the equations found from the data in data set 2. Key words used to describe the data: pH, oscillations, power, HI ========================== Methodological information ========================== A brief method description – what the data is, how and why it was collected or created, and how it was processed: The data are the values of pH and heater power recorded during the carbonylation of phenylacetylene at a temperature of 30 degrees Celsius to see how pH and power oscillations changed as the water content in the system increased from 0-40%. The experiments were performed using power compensation calorimetry. Experiments to extablish the relationship between HI concentration and the observed pH were obtained by adding HI to H2O-MeOH-KI mixtures of the same composition as that used in the PCPOC experiments at 30 degrees Celsius. The pH and HI concentrations were plotted in Microsoft's Excel to obtain the mathematical relationship between the pH observed and the concentration of HI in the system. Instruments, hardware and software used: The PCPOC experiments were conducted in an HEL Simular reaction calorimeter using HEL's WinISO software for datalogging and HEL's iQ software for generating the Qr and energy data from the heater power measurements. The determination of the relationship between HI concentration and pH with in H2O-MeOH-KI mixtures with water content from 0-40% were conducted in 100 mL conical flasks placed in a waterbath held at 30 degrees Celsius. Temperature and pH were monitored and logged using HEL's WinISO software. Microsoft's Excel from Office 2013 to produce all graphs. Date(s) of data collection: August 2010 - August 2017 Geographic coverage of data: Data validation (how was the data checked, proofed and cleaned): Overview of secondary data, if used: ========================= Data-specific information ========================= Definitions of names, labels, acronyms or specialist terminology uses for variables, records and their values: MeOH = Methanol KI = Potassium Iodide HI = Hydriodic Acid PdI2 = Palladium(II) Iodide CO = Carbon Monoxide NaOAc = Sodium Acetate PhAc = Phenylacetylene Explanation of weighting and grossing variables: Outline any missing data: ======= Contact ======= Please contact rdm@ncl.ac.uk for further information