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Diethyl 2,6-diethyl-4,8-dioxo-2,3,6,7-tetrahydro-1H,5H-2,3a,4a,6,7a,8a-hexaazacyclopenta[def]fluorene-8b,8c-dicarboxylate

✍ Scribed by Cao, Li-Ping ;Wang, Yu-Zhou ;Gao, Meng

Publisher
International Union of Crystallography
Year
2007
Tongue
English
Weight
903 KB
Volume
63
Category
Article
ISSN
1600-5368

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✦ Synopsis

The title compound, C 18 H 28 N 6 O 6 , is a derivative of glycoluril, with two ethyl acetate substituents on the convex face of the glycoluril system. Two equivalent six-membered rings bind the N atoms from separate rings of the glycoluril unit to form the flexible sidewalls of a molecular clip. One N atom from each ring carries an ethyl substituent. The crystal packing is stabilized by non-classical C-HÁ Á ÁO hydrogen bonds.

📜 SIMILAR VOLUMES

Diethyl 2,6-diisobutyl-4,8-dioxo-2,3,6,7
Diethyl 2,6-diisobutyl-4,8-dioxo-2,3,6,7-tetra­hydro-1H,5H-2,3a,4a,6,7a,8a-hexa­azacyclo­penta­[def]­fluorene-8b,8c-dicarboxyl­ate
✍ Li, Yi-Tao ;Guo, Qian-Ni 📂 Article 📅 2006 🏛 International Union of Crystallography 🌐 English ⚖ 189 KB

The molecule of the title compound, C 22 H 36 N 6 O 6 , exhibits normal geometric parameters. Both imidazole rings adopt envelope conformations with the C O group at the flap position. The triazinane rings adopt chair conformations.

Diethyl 2,6-dicyclo­hexyl-4,8-dioxo-2,2,
Diethyl 2,6-dicyclo­hexyl-4,8-dioxo-2,2,3,6,7-tetra­hydro-1H,5H-2,3a,4a,6,7a,8a-hexa­azacyclo­penta­[def]fluorene-8b,8c-dicarboxyl­ate
✍ Li, Yi-Tao ;Zhou, Bao-Han ;Yin, Guo-Dong ;Wu, An-Xin 📂 Article 📅 2005 🏛 International Union of Crystallography 🌐 English ⚖ 388 KB

In the title compound, C 26 H 40 N 6 O 6 , the five-membered rings adopt envelope conformations and the six-membered rings are in chair conformations. The crystal packing is stabilized by C-HÁ Á ÁO hydrogen bonds.