Isolation and structure of an 18-membered macrocycle containing two diselenide linkages and its precursor

• Published in: Acta crystallographica. Section C, Crystal structure communications Vol. 75; no. Pt 3; pp. 336 - 341
• Main Authors: Raju, Saravanan, Butcher, Ray J, Singh, Harkesh B
• Format: Journal Article
• Language: English
• Published: England Wiley Subscription Services, Inc 01.03.2019
• Subjects: Crystallography; Linkages; Precursors; Unit cell; crystal structure; diselenide linkage; 18-membered diselenomacrocycle; bis(2-aminophenyl) diselenide; hydrolysis
• DOI: 10.1107/s2053229619002341
• ISSN: 0108-2701

The structures of the 18-membered diselenide-linked macrocycle 10,27-di-tert-butyl 11,28-dioxo-2,3,19,20-tetraselena-10,12,27,29-tetraazapentacyclo[28.4.0.0 .0 .0 ]tetratriaconta-1(30),4(9),5,7,13,15,17,21,23,25,31,33-dodecaene-10,27-dicarboxylate, C H N O Se , and its precursor di-tert-butyl 2,2'-[diselane-1,2-diylbis(2,1-phenylene)]dicarbamate, C H N O Se , are reported. The precusor to the macrocycle contains two tert-butyl phenylcarbamate arms connected to a diselenide group, with Se-C and Se-Se bond lengths of 1.914 (4) and 2.3408 (6) Å, respectively. The macrocycle resides on a crystallographic center of inversion in space group P-1 with one molecule in the unit cell (Z' = 1/2). It contains an 18-membered macrocyclic ring with two diselenide linkages. In this macrocycle, there are two free and two protected amino groups.