
TY  - JOUR
A1  - Nugent, KW 
A1  - Beattie, JK 
A1  - Hambley, TW 
A1  - Snow, MR 
T1  - A precise low-temperature crystal structure of Bis(cyclopentadienyl)beryllium
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1984
VL  - 37
IS  - 8
SP  - 1601
EP  - 1606
KW  - 
UR  - https://doi.org/10.1071/CH9841601 
N2  - The crystal structure of bis(cyclopentadienyl)beryllium has been redetermined at 128(3) K. The crystals are monoclinic, space group P21/n, with unit cell a 5.993(5), b 7.478(4), c 8.978(5)Å, &#946; 85.94(6)º, and Z 2. The essential 'slip-sandwich' structure previously reported is confirmed. The beryllium is disordered between two equivalent sites. In each site it is centrally bonded to one ring and peripherally bonded to the other. There is a small alternation in the C-C distances in the crystallographically equivalent rings towards a cyclopentadiene geometry. From the bond lengths and angles the peripherally bonded cyclopentadienyl ring appears to be bonded to the beryllium with a largely sp2 hybridized carbon. This indicates only a small perturbation of the delocalized &#960;-electron structure of the cyclopentadienyl ring and accounts for the reported Raman spectrum of the compound. 
ER  -

