The reaction of [Os
3(MeCN)
2(CO)
10] with 2,2'-diamino-1,1'-binaphthalene (H
2binam) affordsthe coordinatively unsaturated trinuclear derivative [Os
3(
![](/images/entities/mgr.gif)
-H)(
3-
2-Hbinam-
N,
C)(CO)
9] (
1),which contains a C-metalated Hbinam ligand attached to an Os atom through an NH
2 groupand to the remaining two Os atoms through the metalated C atom. The unsaturation of
1is somewhat relieved by a weak interaction of a naphthalene C=C double bond with an Osatom. Curiously, treatment of [Ru
3(MeCN)
2(CO)
10] with H
2binam does not give the rutheniumanalogue of
1. The stepwise treatment of [Ru
3(CO)
12] with LiHbinam and [HOEt
2][BF
4] leadsto [Ru
3(
![](/images/entities/mgr.gif)
-H)(
![](/images/entities/mgr.gif)
-
1-Hbinam-
N)(CO)
10] (
2), in which an N-metalated Hbinam acts as an edge-bridging amido ligand. Complex
2 reacts with bis(diphenylphosphanyl)methane (dppm) togive [Ru
3(
![](/images/entities/mgr.gif)
-H)
2(
3-
2-binam-
C,
N)(
![](/images/entities/mgr.gif)
-
2-dppm-
P,
P)(CO)
7] (
3). This complex contains a doublyC- and N-metalated binam ligand attached to a Ru atom through the metalated C atom andto the remaining two Ru atoms through the metalated NH fragment. Compounds
1 and
3are the first examples of C-metalated derivatives of H
2binam.