The auracarbora
nes1,2-(AuPPh
3)
2-1,2-C
2B
10H
10(
1) a
nd1,1'-(AuPPh
3)
2-[2-(1',2'-C
2B
10H
10)-1,2-C
2B
10H
10](
2) have bee
n sy
nthesized. Both compou
nds werecharacterized by NMR a
nd X-ray crystallography. Compou
nd
2was fou
nd to co
ntai
n a
n aurophilic i
nteractio
n betwee
n the goldce
nters. A variable-temperature NMR i
nvestigatio
ni
ndicated that the e
nergy barrier separati
ng the gold-gold bo
ndedstate a
nd the
no
nbo
nded state is 11 ± 1 kcal/mol.Compou
nd
1 crystallized i
n the mo
nocli
nic space group
P2
1/
c with
a =18.3380(9) &Ari
ng;,
b = 14.1037(6) &Ari
ng;,
c=19.4716(8) &Ari
ng;,
![](/images/gifchars/beta2.gif)
= 112.003(2)
![](/images/e<font color=)
ntities/deg.gif">,
V = 4669&Ari
ng;
3, a
nd
Z = 4. Data were collected usi
ngMo K
![](/images/gifchars/alpha.gif)
radiatio
n, to a maximum2
![](/images/gifchars/theta.gif)
= 50
![](/images/e<font color=)
ntities/deg.gif">, givi
ng 8865 u
nique reflectio
ns, a
nd the structure wassolved by heavy atom methods. The fi
nal discrepa
ncyi
ndex was
R = 0.047,
Rw = 0.055for 3423 i
ndepe
nde
nt reflectio
ns with
I >3
![](/images/gifchars/sigma.gif)
(
I). Compou
nd
2 crystallized i
nthemo
nocli
nic space group
P2
1/
c with
a = 14.058(6) &Ari
ng;,
b = 18.365(8) &Ari
ng;,
c = 20.387(9) &Ari
ng;,
![](/images/gifchars/beta2.gif)
= 109.22(1)
![](/images/e<font color=)
ntities/deg.gif">,
V = 4970&Ari
ng;
3, a
nd
Z = 4. Data were collected usi
ngMo K
![](/images/gifchars/alpha.gif)
radiatio
n, to a maximum 2
![](/images/gifchars/theta.gif)
= 45
![](/images/e<font color=)
ntities/deg.gif">, givi
ng 5232 u
niquereflectio
ns,a
nd the structure was solved by heavy atom methods. The fi
naldiscrepa
ncy i
ndex was
R = 0.066,
Rw= 0.069 for2536 i
ndepe
nde
nt reflectio
ns with
I >3
![](/images/gifchars/sigma.gif)
(
I).