Abstract
The cyclocondensation of terephthalic aldehyde with
N,N-bis(3-aminopropyl)-methylamine in the presence of silver(I)
gives the dinuclear tetramine Schiff base macrocyclic complex,
[Ag2L1](NO3)2 (L1=7,22-N,N'-dimethyl-3,7,11,18,
22,26-hexaazatricyclo[26.2.21.18.213.16]-tetratricosa-2,11,13,15,1
7,26,28,30,31,33-decaene). [Ag2L1](NO3)2 crystallizes in the
monoclinic space group P21/c, with a=14.153(6), b=12.263(4),
c=9.220(2) Å, beta=97.52(3) Å and Z=2. The silver ions are
strongly coordinated at each end of the macrocycle by the two
imine nitrogen atoms [2.177(3) and 2.182(3) Å] with close
interatomic interactions to an oxygen atom of a nitrate ion and an
amine nitrogen atom [2.580(2) and 2.690(2) Å]. The Ag...Ag
distance is 6.892(3) Å. The free tetraimine macrocycle, L1, was
obtained by treatment of [Ag2L1](NO3)2 with an excess of iodide,
and the reduced derivative
7,22-N,N'-dimethyl-3,7,11,18,22,26-hexaazatricyclo[26.2.21.18.213.
16]tetratricosa-13,15,28,30,31,33-decane, L2, was prepared by
reduction of Ag2L1](NO3)2 with NaBH4. The copper(II) complexes of
the reduced ligand, [Cu2Cl2L2]Cl2xCH3OH, [CU2Cl2L2](PF6)2 and
[Cu2(CH3CO2)2L2](PF6)2x4H2O, have been prepared and characterized.
Original language | English |
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Journal | Acta Chemica Scandinavica |
Volume | 52 |
Pages (from-to) | 571-577 |
Publication status | Published - 1998 |