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

• Published in: Acta crystallographica. Section C, Crystal structure communications Crystal structure communications, 2019-03, Vol.75 (3), p.336-341
• Main Authors: Raju, Saravanan, Butcher, Ray J., Singh, Harkesh B.
• Format: Article
• Language: English
• Subjects: 18‐membered diselenomacrocycle; bis(2‐aminophenyl) diselenide; crystal structure; Crystallography; diselenide linkage; hydrolysis; Linkages; Precursors; Unit cell
• ISSN: 2053-2296; 0108-2701; 2053-2296; 1600-5759
• DOI: 10.1107/S2053229619002341

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[28.4.0.04,9.013,18.021,26]tetratriaconta‐1(30),4(9),5,7,13,15,17,21,23,25,31,33‐dodecaene‐10,27‐dicarboxylate, C36H34N4O6Se4, and its precursor di‐tert‐butyl 2,2′‐[diselane‐1,2‐diylbis(2,1‐phenylene)]dicarbamate, C22H28N2O4Se2, 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 with one molecule in the unit cell (Z′ = ). It contains an 18‐membered macrocyclic ring with two diselenide linkages. In this macrocycle, there are two free and two protected amino groups. The structures of an 18‐membered azamacrocycle containing two disselenide linkages and its precusor are reported.