Isotope Effect on Eutectic and Hydrate Melting Temperatures in the Water-THF System

Table 2

Eutectic and melting points for the four isotopic THF-water mixtures. The temperatures reported are averages of 3–6 measurements; standard errors are reported for the 95% confidence limit.

Wt%	Eutectic	Hydrate melting
THF+H2O
6.95	$272.05\pm 0.00$	$275.62\pm 0.04$
9.80	$272.06\pm 0.01\mathrm{\hspace{0.17em}\hspace{0.17em}}$	$276.52\pm 0.08$
13.71	$272.10\pm 0.01\mathrm{\hspace{0.17em}\hspace{0.17em}}$	$277.44\pm 0.03$
15.89	$272.04\pm 0.01\mathrm{\hspace{0.17em}\hspace{0.17em}}$	$278.09\pm 0.02\mathrm{\hspace{0.17em}\hspace{0.17em}}$
18.43	$272.06\pm 0.00$	$278.15\pm 0.03$
THF-d8+H2O
6.02	$271.98\pm 0.00$	$273.82\pm 0.02$
10.67	$271.96\pm 0.01$	$276.02\pm 0.06$
14.13	$271.97\pm 0.01$	$276.89\pm 0.02$
18.00	$271.94\pm 0.00$	$277.73\pm 0.02$
19.72	$271.91\pm 0.01$	$277.98\pm 0.03$
THF+D2O
7.00	$275.83\pm 0.01\mathrm{\hspace{0.17em}\hspace{0.17em}}$	$278.53\pm 0.03$
10.08	$275.73\pm 0.05\mathrm{\hspace{0.17em}\hspace{0.17em}}$	$279.82\pm 0.04$
12.60	$275.81\pm 0.02\mathrm{\hspace{0.17em}\hspace{0.17em}}$	$281.02\pm 0.02$
14.19	$275.82\pm 0.02\mathrm{\hspace{0.17em}\hspace{0.17em}}$	$281.22\pm 0.02$
17.34	$275.73\pm 0.02\mathrm{\hspace{0.17em}\hspace{0.17em}}$	$281.61\pm 0.01$
THF-d8+D2O
6.78	$275.74\pm 0.01\mathrm{\hspace{0.17em}\hspace{0.17em}}$	$277.46\pm 0.02$
9.57	$275.70\pm 0.00\mathrm{\hspace{0.17em}\hspace{0.17em}}$	$279.01\pm 0.04$
13.31	$275.72\pm 0.00\mathrm{\hspace{0.17em}\hspace{0.17em}}$	$280.33\pm 0.02$
16.39	$275.64\pm 0.01\mathrm{\hspace{0.17em}\hspace{0.17em}}$	$280.54\pm 0.05$
18.91	$275.63\pm 0.02\mathrm{\hspace{0.17em}\hspace{0.17em}}$	$281.14\pm 0.02$