ISSN:
1572-8854
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract The products of monocondensation of penta-2,4,-dione with 1,2-diaminoethane, HAE, and with 1,3-diaminopropane, HAT, react with copper nitrate hemipentahydrate to give catena-μ-nitrato (7-amino-5-aza-4-methyl-3-hepten-2-onato) copper(II), [Cu(AE)NO3]n and a mixture ofμ 3-hydroxo-tris (μ-8-amino-5-aza-4-methyl-3-octen-2-onato) tricopper(II) dinitrate [Cu3(AT)3OH]-(NO3)2 and [Cu(AT)NO3]x, respectively. The structure of [Cu(AE)NO3]n has been determined from 1601 diffractometer data and refined by least squares methods toR=0.0306. The compound crystallizes in the monoclinic space groupP21/a witha=16.856(3)Å,b=8.109(4)Å,c=7.518(3)Å,β=90.15(2)°,D c =1.725 g cm−3,D o=1.72 g cm−3 andZ=4. Copper atoms in [Cu(AE)NO3]n are in a 4+1+1* environment and are linked by the pseudobidentate and bridging nitrato group into infinite chains. The structure of [Cu3(AT)3OH](NO3)2 has been determined from 3178 diffractometer data and refined toR=0.0544. The compound crystallizes in the triclinic space groupP¯1 witha=11.918(2)Å,b=14.478(2)Å,c=11.501(3)Å,α=98.04(2)°,β=117.72(2)°, γ=99.80(1)°,D c =1.580 g cm−3,D o=1.59 g cm−3 andZ=2. The compound is associated in hexanuclear clusters due to hydrogen bonding interactions. Coordination about Cu is best described as square pyramidal. Magnetic susceptibility data indicate a weak antiferromagnetic exchange within the trinuclear core withJ=−14 cm−1.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01195401
Permalink