Doubly bridged
-alkoxo-
-X (X = pyrazolato or acetato) dinuclear Mn
III complexes of 2-hydroxy-
N-{2-hydroxy-3-[(2-hydroxybenzoyl)amino]propyl}benzamide) (H
5L
1)
and 2-hydroxy-
N-{2-hydroxy-4-[(2-hydroxybenzoyl)amino]butyl}benzamide (H
5L
2), [Mn
2(L)(pz)(MeOH)
4]·
xMeOH (
1, L = L
1,
x = 0.5;
2, L = L
2,
x = 0; Hpz = pyrazole)
and[Mn
2(L
1)(OAc)(MeOH)
4] (
3), have been prepared,
and their structure
and magnetic properties have been studied.The X-ray diffraction analysis of
1 (C
24.5H
34Mn
2N
4O
9.5, triclinic,
P,
a = 12.2050(7) Å,
b = 12.7360(8) Å,
c =19.2780(10) Å,
= 99.735(5)
,
= 96.003(4)
,
= 101.221(5)
,
V = 2867.6(3) Å
3,
Z = 4),
2 (C
25H
34Mn
2N
4O
9,triclinic,
P,
a = 9.4560(5) Å,
b = 11.0112(5) Å,
c = 13.8831(6) Å,
= 90.821(4)
,
= 92.597(4)
,
=93.403(4)
,
V = 1441.29(12) Å
3,
Z = 2),
and 3 (C
23H
32Mn
2N
2O
11, triclinic,
P,
a = 10.511(5) Å,
b = 11.713(5) Å,
c = 13.135(5) Å,
= 64.401(5)
,
= 74.000(5)
,
= 66.774(5)
,
V = 1329.3(10) Å
3,
Z = 2) revealed that allcomplexes consist of dinuclear units which are further extended into 1D (
1 and 3)
and 2D (
2) supramolecularnetworks via hydrogen-bonding interactions. Magnetic susceptibility data evidence antiferromagnetic interactionsfor all three complexes:
J = -3.6 cm
-1,
D 0 cm
-1,
g = 1.93 (
1);
J = -2.7 cm
-1,
D = 0.8 cm
-1,
g = 1.93(
2);
J = -4.9 cm
-1,
D = 3.8 cm
-1,
g = 1.95 (
3).