[Cu44Se22(PEt2Ph)18] and [Cu44Se22(PnButBu2)12]: Synthesis and Structure of Two Copper Clusters with Isomeric CuSe Frameworks
✍ Scribed by Dipl.-Chem. Stefanie Dehnen; Prof. Dr. Dieter Fenske
- Book ID
- 101553225
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 436 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0044-8249
No coin nor oath required. For personal study only.
✦ Synopsis
COMMUNICATIONS
[12] on a Vax computer wa? used for all calculations. To take advantage of noncrystallographic symmetry introduced by chemically identical moities, the structure was refined with the SHELX-93 software package [13] (F' refincinents). The 12 pyridarinea. the 12 methylpyridincs, the 9 tritlate anions. and the 5 nitromethane molecules w'ere refined as identical. rigid groups (0 of equivalent bond lengths: 0.03 A). the geometriev were taken from ref.
[K], [XI. (141. and [15], respectively. The pyridaine and methylpyridine groups were restrained to be planar within 0.2 A These restraints reduced the number of variables in the retinement to 624. this takes i n l o account the poor observed data:ine;isured data ratio and hence the low diffrxtion power oi'the cr All hydrogen atoms were omitred. Final R ( F ) = 0.109. Ftirrher details crystal structure investigation are available on rcquest from the Director ofthe Cambridge Crystallographic Data Centre, 12 Union Road. GB-Cambridge CB2 IEW (UK). on quoting the full journal citation.
[12] Molen, A n Intrrui~ri,c Srrui,rurr Soli,rioii P r i w d u w . E n d -N o n i u s . Delft. Holland, 1990.