Crystal and molecular structures of 1,8-diacetyl-3-methyl-DL-allantoin
โ Scribed by M. V. Reshetnyak; S. G. Il'in; N. K. Utkina; A. I. Yanovskii; Yu. T. Struchkov
- Publisher
- Springer
- Year
- 1988
- Tongue
- English
- Weight
- 263 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0009-3130
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## Abstract The molecular structures of naphtho[1,8โ__cd__][1,2]dithiole, naphtho[1,8โ__cd__][1,2]diselenole, naphtho[1,8โ__cd__][1,2]ditellurole, naphtho[1,8โ__cd__]โ [1,2]dithiole 1โoxide, naphtho[1,8โ__cd__][1,2]dithiole 1,1โdioxide, and naphtho[1,8โ__cd__][1,2]dithiole 1,1,2โtrioxideand naphtho
X-Ray diffractometry of methyl 3,4-anhydro-a-nL-allopyranoside (3) revealed the crystals to be monoclinic, space group Cc, with cell dimensions a = 6242(l), b = 16.987(2), c = 7.739(l) A; /I = 106.09(l)", Z = 4. The 3,4\_anhydropyranose ring adopts a hybrid 'E + '&conformation. Relatively strong int