Two novel bis-azomethines derived from quinoxaline-2-carbaldehyde.
نویسندگان
چکیده
The Schiff base compounds N,N'-bis[(E)-quinoxalin-2-ylmethylidene]propane-1,3-diamine, C(21)H(18)N(6), (I), and N,N'-bis[(E)-quinoxalin-2-ylmethylidene]butane-1,4-diamine, C(22)H(20)N(6), (II), crystallize in the monoclinic crystal system. These molecules have crystallographically imposed symmetry. Compound (I) is located on a crystallographic twofold axis and (II) is located on an inversion centre. The molecular conformations of these crystal structures are stabilized by aromatic pi-pi stacking interactions.
منابع مشابه
Synthesis of some new mono- and bis-polycyclic aromatic spiro and bis-nonspiro-beta-lactams.
Some new mono-and bis-polycyclic aromatic spiro-beta-lactams and bis-non spiro-polycyclic aromatic beta-lactams have been synthesized from imines derived from anthracene-9-carbaldehyde, 2-naphtaldehyde and a ketene derived from 9H-xanthene-9-carboxylic acid and phenoxyacetic acid by a [2+2] cycloaddition reaction. The cycloadducts were characterized by spectral data, including 1H-NMR, 13C-NMR, ...
متن کاملSynthesis, In vitro Antimicrobial and Cytotoxic Activities of Some Novel Bis- 1, 3, 4-oxadiazoles
A series of novel bis-1,3,4-oxadizaoles were synthesized by oxidative cyclisation of respective Schiff bases derived from dicarbohydrazide using ceric ammonium nitrate (CAN) as catalyst. The synthesized compounds were screened for in vitro antibacterial activity against Staphylococcus aureus (MTCC 87), Escherichia coli (MTCC 46) and antifungal activity against Candida albicans (NCIM 3471) by tw...
متن کاملBis[μ-2,3-bis(imidazol-1-ylmethyl)quinoxaline]disilver(I) bis(tetrafluoridoborate)
The title compound, [Ag(2)(C(16)H(14)N(6))(2)](BF(4))(2), forms a centrosymmetric 22-membered metallamacrocycle via two Ag(I) ions bridging two 2,3-bis-(imidazol-1-ylmeth-yl)quinoxaline ligands. The Ag(I) ions are coordinated by two N donors of the imidazole groups, forming an approximately linear coordination geometry.
متن کاملMesomorphic Behavior of Symmetrical and Unsymmetrical Azomethines with Two Imine Groups
Seven symmetrical azomethines with two imine groups (HC=N) were synthesized by condensation of the benzene-1,4-dicarboxaldehyde with five amines (first group: A1-A5) and of the 2,5-thiophenedicarboxaldehyde with two amines (second group: AT1-AT2). Additionally, two unsymmetrical azomethines were obtained by a two step condensation of benzene-1,4-dicarboxaldehyde with pyren-1-amine (1 step) (abb...
متن کامل2,3-Bis(4-ethoxyphenyl)quinoxaline
The title compound, C(24)H(22)N(2)O(2), was prepared by condensation of 1,2-bis-(4-ethoxy-phen-yl)ethane-1,2-dione and 1,2-diamino-benzene. The asymmetric unit contains one half-mol-ecule, close to a twofold axis. The plane of the quinoxaline ring is twisted with respect to the planes of the two ethoxy-phenyl ring systems, exhibiting dihedral angles of 39.95 (9)°. The crystal packing is dominat...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Acta crystallographica. Section C, Crystal structure communications
دوره 65 Pt 12 شماره
صفحات -
تاریخ انتشار 2009