Table 1. Summary of Experimental and Theoretical Studies Relevant to C₂–C₄ Alkenes + Ḣ.

year	author	reaction(s)	T (K)	p (kPa)	method
2020	Nagaraja et al.32	pyrolysis of C2–C6 1-alkenes	900–1800	200	single-pulse shock tube (SPST)
2020	Chen et al.20	Ḣ + C3H6	1065–1306	100–200	Ḣ-ARAS/shock-tube CCSD(T)/CBS//CCSD/6-311++G(3df,2p)
2018	Wang et al.33	C4–C6 alkenes + Ḣ and ĊH3			G4 composite method
2015	Manion et al.19	Ḣ + C4H8-1	880–1120	145–245	single-pulse shock tube (SPST)
2013	Matsugi et al.16	photodissociation of Ċ2H5			direct trajectory calculations ωB97X-D/6-31+G(d,p)
2013	Miller et al.18	dissociation of propyl radicals and other reactions on Ċ3H7 potential		0–HPL	CCSD(T)/cc-pVTZ MP2/6-311++G(d,p)
2012	Yang et al.15	decomposition of ethyl iodide/dissociation of Ċ2H5 radicals	1150–1870	7.3–16.4	diaphragm-less shock tube/laser schlieren (LS) densitometry
2011	Rosado-Reyes et al.28	Ḣ + C3H6	922–1200	150–340	single-pulse shock tube (SPST)
2004	Miller et al.17	Ḣ + C2H2 and C2H4	300–2000	>0.13/HPL	variational transition state theory (VTST), 2D master equation
1993	Hanning-Lee et al.8	Ḣ + C2H4	800	12.9–80.0	exciplex laser flash photolysis/time-resolved resonance fluorescence
1993	Feng et al.7	unimolecular decomposition of Ċ2H5	876–1094	0.1–1.9	heated tubular reactor/to a photoionization mass spectrometer
1993	Seakins et al.23	iĊ3H7 decomposition	720–910		laser flash photolysis/photoionization mass spectrometry
1992	Tsang36	database for hydrocarbon pyrolysis			estimate
1992	Hidaka et al.29	thermal decomposition of C3H6	1200–1800		laser kinetic absorption spectroscopy/GC
1991	Tsang37	database for hydrocarbon pyrolysis			estimate
1989	Löser et al.30	Ḣ atom abstraction by allyl radicals from hydrocarbons			BSBL
1987	Lightfoot et al.10	Ḣ + C2H4	285–604	6.7–80.0	laser flash photolysis/resonance fluorescence
1986	Munk et al.25	iĊ3H7 and iĊ3H7O2	298	101	UV absorption/pulse photolysis
1984	Pacey et al.13	pyrolysis of C2H6	902	HPL	flow system
1982	Watanabe et al.27	Ḣ + C3H6	200–500		pulse radiolysis-resonance absorption
1982	Harris et al.31	Ḣ + C3H6/C4H8	298–455		flash photolysis-resonance fluorescence
1981	Sugawara et al.14	Ḣ- and D-atom addition to C2H4, C2H3D, C2D4, C2H2, and C2D2	206–461		pulse radiolysis-resonance absorption
1978	Lee et al.9	Ḣ + C2H4	198–320	0.13	flash photolysis-resonance fluorescence (FP-RF) technique
1973	Michael et al.12	Ḣ + C2H4			Lyman α photometry
1972	Kerr et al.24	evaluated kinetic data on gas-phase addition reactions
1971	Kurylo et al.26	Ḣ + C3H6	298		resonance fluorescence of Lyman α radiation
1970	Barker et al.6	Ḣ + C2H4			discharge flow system with Lyman-α photometry, time-resolved Lyman-α photometric system, and discharge flow system with time-of-flight mass spectrometry