Repeated attempts at elemental analyses gave percentages that were low in nitrogen. Examples are 3a: Anal. Calcd. for C 6 H 10 N 2 O 6 : C, 34.96; H, 4.89; N, 13.59. Found: C, 35.07; H, 4.85; N, 12.01 and 3b: Anal. Calcd. for C 8 H 14 N 2 O 6 : C, 41.03; H, 6.03; N, 11.96. Found: C, 41.54, H, 5.95; N, 11.24. This is consistent with the facile loss of N 2 from these compounds. ... Cookies are used by this site. To decline or learn more, visit our Cookies ...