Metal-Metal Bonds (2)
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Double-click atoms to measure distances.
What is the
M-M bond
order based on the
electron count
?
Is the geometry staggered or eclipsed? Are multiple bonds shorter?
A
Cu
2
(CH
3
COO)
4
(H
2
O)
2
Cu
2
(CH
3
COO)
4
py
2
Cu
2
(PhCOO)
4
(PhCOOH)
2
Cu
2
Cl
4
-2
B
Pt
2
(CH
3
COO)
4
(H
2
O)
2
(ClO
4
)
2
Rh
2
(CH
3
COO)Cp
*
2
H
2
+
Rh
2
(CH
3
COO)
4
(H
2
O)
2
Rh
2
(CH
3
COO)
4
py
2
C
Ru
2
(CH
3
COO)
4
Cl
2
-2
Ru
2
(CH
3
COO)
4
Cl
2
–
Os
2
(CH
3
COO)
4
Cl
2
Tc
2
(CH
3
COO)
4
Cl
2
D
Cr
2
(CH
3
COO)
4
(H
2
O)
2
W
2
(CF
3
COO)
4
(PPh
3
)
2
{
Cr
2
(CH
3
COO)
4
Mo
2
(CH
3
COO)
4
}
Pt
4
(CH
3
COO)
8
E
Re
2
(CH
3
COO)
2
Br
4
Mo
2
(CH
3
COO)
2
(PPh
3
)
2
Cl
2
Ru
2
(CH
3
COO)
2
(PCy
3
)
2
(CO)
4
Ir
2
(CH
3
COO)
2
(PCy
3
)
2
Cl
2
(CO)
2
F
Mo
2
(CF
3
COO)
2
Br
4
-2
Tc
2
(CH
3
COO)
2
Cl
4
Ru
2
(CH
3
COO)
2
py(CO)
4
Ir
2
(CH
3
COO)
2
py
2
(CO)
3
SbF
6
G
Mo
2
(SO
4
)
4
-4
Mo
2
(O
2
P(OPh)
2
)
4
Mo
2
(SO
4
)
4
-3
Mo
2
(O
2
P(OPh)
2
)
4
+
Other N & P ligands
(see
ligand formulas
)
H
Mo
2
Cl
4
(PMe
2
CH
2
CH
2
PMe
2
)
2
{
Mo
2
Cl
4
(pcp)
2
W
2
Cl
4
(pcp)
2
}
{
Mo
2
Br
6
(pcp)
2
W
2
Cl
6
(pcp)
2
}
{
Tc
2
Cl
4
(pcp)
2
Re
2
Cl
4
(pcp)
2
}
I
W
2
Cl
4
H
2
(pcp)
2
Nb
2
Cl
6
(pcp)
2
Re
2
Cl
6
(pcp)
2
Re
2
(CO)
4
(CH
2
)
2
(pcp)
2
J
Re
2
(CH
3
)
4
(pcp)
2
Ru
2
(CO)
4
(CH
2
)(pcp)
2
Ru
2
(CO)
2
Cl
2
(pcp)
2
Ru
2
(CO)
5
(pcp)
2
K
Ru
2
(CO)
2
(CH
3
CN)
4
(pcp)
2
+2
Ru
2
(CO)
4
I
2
(pcp)
Ru
2
Cp
*
2
Cl
2
(pcp)
+2
Ru
2
Cp
2
(CO)(CH)(pcp)
2
+
L
Pd
2
(P
i
Pr
2
CH
2
P
i
Pr
2
)
2
Rh
2
(CO)
2
H
2
(P
i
Pr
2
CH
2
P
i
Pr
2
)
2
Rh
2
Cp
2
(CO)(pcp)
Rh
2
(CO)
2
(CH
3
)(pcp)
2
+
M
Co
2
(CO)
6
(pcp)
Ir
2
(CO)
2
Cl
2
I
2
(pcp)
2
Ir
2
Cp
*
2
H
2
(pcp)
+2
Ir
2
(CO)
3
Cl
2
(pcp)
2
N
{
Ag
2
(pcp)
2
+2
Au
2
(pcp)
2
+2
}
Ni
2
(CO)
3
(pcp)
2
Pd
2
Cl
2
(pcp)
2
Pt
2
(CO)
2
(pcp)
2
+2
O
V
2
(dpa)
4
W
2
(dpa)
4
+2
Mo
2
(dpa)
4
Cr
3
(dpa)
4
Cl
2
P
Ru
3
(dpa)
4
Cl
2
Ni
3
(dpa)
4
+3
Ni
3
(dpa)
4
Cl
2
Cu
3
(dpa)
4
Cl
2
+
Q
Cr
2
(pip)
4
Cr
2
(dmba)
4
Ru
2
(dmba)
4
Cl
2
Ru
2
(dmba)
4
Ph
2
R
Co
2
(dpba)
4
Rh
2
(dpba)
4
Pd
2
(dpba)
4
Au
4
(dpba)
4
S
Cr
2
(dmfa)
4
Ni
2
(dmfa)
4
Mo
2
(bipba)
2
Re
2
(dpaa)
2
Cl
4
T
Cr
2
(tipmap)
2
Cr
2
(dmsfa)
2
Fe
2
(bippc)
2
Ni
2
(bippg)
2
U
{
Cr
2
(hhpp)
4
Mo
2
(hhpp)
4
}
{
Re
2
(hhpp)
4
Cl
2
Re
2
(hhpp)
4
F
2
}
V
2
(hhpp)
4
Cu
2
(hhpp)
2
V
Re
2
(hhpp)
4
Cl
2
+
Re
2
(hhpp)
4
+2
Pd
2
(hhpp)
4
Pd
2
(hhpp)
4
Cl
2
W
Cu
2
(btp)
2
(CO)
2
Cu
2
(btp)
3
(CO)
2
–
Cu
4
(btp)
4
(CO)
4
Br
–
Ru
2
(btp)
2
(CO)
6
X
Rh
2
(btp)
4
(H
2
O)
2
{
Rh
2
(btp)
2
(CH
2
=CH
2
)
4
one }
Rh
2
(bmp)
4
(CH
3
CN)
2
Ru
2
(bmp)(CH
3
COO)(CO)
4
(PPh
3
)
2
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Cp = η
5
-C
5
H
5
, Cp
*
= η
5
-C
5
(CH
3
)
5
,
Ph = -C
6
H
5
, Cy = -C
6
H
11
,
Me = -CH
3
, Et = -CH
2
CH
3
,
i
Pr = -CH(CH
3
)
2
,
t
Bu = -C(CH
3
)
3
,
py = C
5
H
5
N,
pcp =
PPh
2
CH
2
PPh
2
,
dpa =
2,2'-dipyridylamido,
pip =
2-(phenylimino)piperidinato,
dmba =
dimethylbenzamidinato,
dpba =
diphenylbenzamidinato,
dmfa =
dimethylformamidinato,
dpaa =
diphenylacetamidinato,
dmsfa =
dimesitylformamidinato,
bipba =
bis(2,6-di-isopropylphenyl)-
benzamidinato,
bippc =
bis(2,6-di-isopropylphenyl)-
2,6-dimethylpiperidine-
1-carboximidamidato,
bippg =
bis(2,6-di-isopropylphenyl)-
1,1-di-isopropylguanidinato,
tipmap =
2,4,6-tri-isopropylphenyl-
mesitylaminopyridinato,
hhpp =
1,3,4,6,7,8-hexahydro-2H-
pyrimido(1,2-a)pyrimidine,
btp =
3,5-bis(trifluoromethyl)pyrazolato,
bmp =
3,5-bis(methyl)pyrazolato
Counter ions might be shown
. See
references
for ligand formulas and the crystal structures.
Sets in { } count as one problem.
This page created by George Lisensky, Beloit College.
Last modified February 20, 2023.
CO
N
NO
C
C=C
Cp
Cp2
MM
MM2
Z
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