The win
dmill-shape
d hexanuclear copper(II) cluster {(H
2O)
2Cu
2(
3-(A
de)
4[Cu(o
da)(H
2O)]
4}·6H
2O (
1-o) has beensynthesize
d in aqueous me
dium by in situ core-controlle
d expansion of the neutral buil
ding block Cu
2(
2-N3,N9-A
de)
4(H
2O)
2 (
2) with Cu(o
da)(H
2O) (
3-o) (A
de = a
deninato(1-) an
d o
da = oxy
diacetato(2-) ligan
ds). Crystal
datafor
2-b (
2·5H
2O): triclinic, space group P
;
a = 9.374(1),
b = 9.440(1),
c = 10.326(1) Å;
= 78.72(1),
ddle"> =76.77(1),
= 63.51(1)
deg.gif">; final
R1 = 0.059;
T = 100(2) K. Crystal
data for
1-o: monoclinic, space group
P2
1/
n;
a= 15.203(2),
b = 10.245(1),
c = 19.094(2) Å;
ddle"> = 101.61(1)
deg.gif">; final
R1 = 0.049;
T = 293(2) K. The X-shape
dhexanuclear molecule consists of a central core (
2) an
d four terminal arms (
3-o) linke
d together by bri
dging
3-N3,N7,N9-A
de ligan
ds. There are three crystallographic in
depen
dent metal atoms (two terminals, one central). AllCu(II) atoms exhibit a 4 + 1 coor
dination, of which one is an aqua apical ligan
d. The basal coor
dination setscomplete the CuN
4 + O or CuO
3N + O chromophores for the central or terminal metal atoms, respectively. Thermalstability an
d spectral an
d magnetic properties were also stu
die
d. Analogous compoun
ds to
1-o with tri
dentate ortripo
dal tetra
dentate ligan
ds L
2-, instea
d of o
da, have also been synthesize
d.