The
two novel compounds, [Mn(
tren)]Sb
2S
4 (
1 and
2), were ob
tained by
the reac
tion of elemen
tal Mn, Sb, and Sin aqueous solu
tions of
tren (
tren =
tris(2-aminoe
thyl)amine, C
6H
18N
4) af
ter differen
t reac
tion
times. Compound
1is formed up
to a reac
tion
time of 13 d, and an ex
tension of
the reac
tion
time leads
to
the forma
tion of
2. Bo
thcompounds crys
tallize in monoclinic space groups (
1,
P2
1/
c;
2,
C2/
c). In
1,
the
two unique SbS
3 trigonal pyramidsshare a common S a
tom
to form a Sb
2S
5 uni
t. Two S a
toms of
this group have a bond
to Mn
2+ yielding a MnSb
2S
3he
teroring in
the boa
t conforma
tion. The Sb
2S
5 moie
ties are joined via common corners in
to
the final undula
ted
![](/isubscribe/journals/inocaj/45/i09/eqn/ic0519739e10001.gif)
[Sb
2S
4]
2- anion which is direc
ted along [001]. The s
truc
ture of
2 con
tains
the [Mn(
tren)]
2+ ion, one SbS
3 pyramid,and a SbS
4 uni
t. Two symme
try-rela
ted SbS
4 groups share an edge, forming a Sb
2S
6 group con
taining a Sb
2S
2ring. This group is joined via corners
to
two SbS
3 pyramids on bo
th sides producing a Sb
4S
4 ring. The Sb
2S
2 andSb
4S
4 rings are condensed in
to
the final
![](/isubscribe/journals/inocaj/45/i09/eqn/ic0519739e10002.gif)
[Sb
2S
4]
2- anion which runs along [010]. The [Mn(
tren)] groups are bound
to
the
thioan
timona
te(III) backbone on opposi
te sides of
the Sb
4S
4 ring, and a small MnSbS
2 ring is formed. In bo
ths
truc
tures, weak S···H bonds are found which may con
tribu
te
to
the s
tabili
ty of
the ma
terials. The
two compoundsdecompose in one s
tep upon hea
ting, and only MnS and Sb
2S
3 could be iden
tified as
the crys
talline par
t of
thedecomposi
tion produc
ts. Bo
th compounds can also be prepared under solvo
thermal condi
tions using MnSb
2S
4 ass
tar
ting ma
terial. Compounds
1 and
2 are ob
tained from
this
ternary ma
terial in a high yield.