Loading…
A niobium-necked cluster [AsNb(AsSn)] with aromatic Sn
We describe here the synthesis and characterization of a ternary cluster compound [As 3 Nb(As 3 Sn 3 )] 3− ( 1 ), in which a niobium( v ) atom is coordinated by an As 3 3− triangle and a bowl-type As 3 Sn 3 5− ligand. Cluster 1 was synthesized by dissolving K 8 NbSnAs 5 ( 2 ) in the presence of [2.2...
Saved in:
| Published in: | Dalton transactions : an international journal of inorganic chemistry 2016-02, Vol.45 (9), p.3874-3879 |
|---|---|
| Main Authors: | , , , , , , , |
| Format: | Article |
| Language: | |
| Online Access: | Get full text |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | We describe here the synthesis and characterization of a ternary cluster compound [As
3
Nb(As
3
Sn
3
)]
3−
(
1
), in which a niobium(
v
) atom is coordinated by an As
3
3−
triangle and a bowl-type As
3
Sn
3
5−
ligand. Cluster
1
was synthesized by dissolving K
8
NbSnAs
5
(
2
) in the presence of [2.2.2]crypt in ethylenediamine solution, filtered and layered with toluene, then crystallized in the form of [K([2.2.2]crypt)]
3
[As
3
Nb(As
3
Sn
3
)]·en·tol. The flower-vase shaped compound
1
features a new structure type, rather different from the known Zintl phases. The stability and bonding of
1
are elucidated
via
extensive bonding analyses. The Sn
3
ring is found to have σ-aromaticity featuring a delocalized Sn-Sn-Sn σ bond. Electronic structure calculations confirm the Nb(
v
) oxidation state and weak Nb-Sn and Sn-Sn bonding, in addition to the normal Nb-As and As-As bonds.
A new Zintl cluster [As
3
Nb(As
3
Sn
3
)]
3−
was synthesized and characterized, in which an As
3
triangle and a bowl-type As
3
Sn
3
ligand are bridged by a niobium atom. The Sn
3
ring is found to have σ-aromaticity featured by a delocalized Sn-Sn-Sn σ orbital. |
|---|---|
| ISSN: | 1477-9226 1477-9234 |
| DOI: | 10.1039/c6dt00028b |