Stabilization of Decatellurium Molecules in Isolated and Concatenated Clusters
Stabilization of Decatellurium Molecules in Isolated and Concatenated Clusters
复制标题
孤立和串联簇中十铍分子的稳定性
DOI:
10.1002/zaac.201200430
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
M. Ruck
中科院分区:
文献类型:
--
作者:
A. Günther;A. Isaeva;M. Ruck
Black, shiny crystals of the molecular cluster compounds (Te10) M (TeX4)(TeX3) 2 (M/X= Rh/Cl (1), Ir/Br (2)),(Te10) Ru (TeI4)(TeI2) 2 (3),(Te10) M (TeI4)(TeI2) 2 (TeI4)(Te2I2)(M= Rh (4), Ir (5)) as well as the one‐dimensional cluster polymer (Te10I2) Ir (TeI4) 2 (Te4) I2 (6) were synthesized by melting reactions of an electron‐rich transition metal M (M= Ru, Rh, Ir) with tellurium and TeX4 (X= Cl, Br, I). X‐ray diffraction on single‐crystals revealed that the compounds crystallize in the triclinic space group type P ̄1. 4 and 5 show 3+ 1‐dimensional modulations of their structures. All compounds contain binuclear complexes with central μ‐η4: η4‐bridging Te10 units and terminal halogenidotellurate (II) groups. Each of the transition metal cations is in a slightly distorted octahedral coordination by six tellurium atoms; the two MTe6 octahedra share a common edge. With the tellurium atoms acting as electron‐pair donors, the 18 electron rule is fulfilled for the electrophilic M atoms. The central tricyclo 5.1. 1.13, 5‐decatellurium molecule consists of two ecliptically stacked Te4 rings, which are linked through two tellurium atoms. The symmetric or asymmetric 3c4e bonds along these almost linear bridges are in analogy to polyanionic forms of tellurium, while the tricyclic conformation is stabilized by the strong bonding to the transition‐metal cations. Multi‐center bonding (3c4e) is also present in the terminal square Te+ IIX4 2–and the T‐shaped Te+ IIX3–groups. The crystal structures of 4 and 5 are organized in layers of (Te10) M (TeI4)(TeI2) 2n+ clusters (n≤ 2) that are quite robust upon oxidation or reduction as shown by molecular calculations. These clusters alternate with incommensurately modulated layers that probably consist of TeI42–anions and a previously unknown Te2I2 molecule. The uncertainty arises primarily from equal scattering powers of I and Te atoms as well as from the known flexibility of the electron count of the Te10 unit. In 6, neutral Te4 rings concatenate (Te10I2) Ir (TeI4) 2 clusters into chains, which run parallel to the a axis.
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影响因子:
1.4
作者:
Beck, J;Steden, F;Fölsing, H
通讯作者:
Fölsing, H
DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
W. Ando;Tetsuji Kadowaki;Yoshio Kabe;Motohiko Ishii
通讯作者:
Motohiko Ishii
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
M. Fujiwara;N. Tajima;T. Imakubo;M. Tamura;R. Kato
通讯作者:
R. Kato
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
J. Jeske;W. D. Mont;P. G. Jones
通讯作者:
P. G. Jones
DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
W. Sheldrick;M. Wachhold
通讯作者:
M. Wachhold