作者:Joel T. Mague、Etim E. Eduok
DOI:10.1023/a:1009557123632
日期:——
For the synthesis of precursors to cellulose-based ion exchange materials, the condensation of diaminomaleonitrile with 2,4-pentanedione and 2,5-hexanedione was explored. Whilst the former diketone yielded the expected l,4-diazepine (2), the latter gave either a pyrrole derivative (3) or an unusual triazabicyclononene (4), depending on the conditions lsed. Compound 4 crystallizes in the monoclinic space group P2(1)/c with a = 8.9313(10) Angstrom, b = 9.0370(7) Angstrom, c = 11.4448(9)Angstrom. beta = 102.48(8)degrees, V = 901.89(14) Angstrom (3), and Z = 4. Compound 3 crystallizes in the orthorhombic space group Pna2(1) with a = 12.0342(8) Angstrom, b = 8.3760(8) Angstrom, c = 10.7026(11) Angstrom, V = 1078.81(17) Angstrom (3), and Z = 4. Compound 4 crystallizes in the monoclinic space group P2(1)/c with a = 9.0157(5) Angstrom, b = 13.5374(9) Angstrom, c = 12.8751(16) Angstrom, beta = 99.506(5)degrees, V = 1549.82(15) Angstrom (3), and Z = 4. In both 3 and 4 the aminovinyl substituent shows evidence for involvement of the lone pair on nitrogen with the carbon pi -system. Also, 3 and 4 are highly associated in the solid state via hydrogen bonding.