Abstract
The compound (n-Bu4N)2[Re4Cl8(μ-Cl)2(μ-O)2 · 2THF] has been prepared from (n-Bu4N)2 Re2Cl8 by refluxing it in wet trifluoroacetic acid. It forms brown, block-shaped crystals in space group P\(\bar 1\), withZ = 2 in a cell of dimensions:a = 11.748(1) Å,b = 16.847(3) Å,c = 16.953(3) Å, α = 97.53(1)°β = 106.49(1)° γ = 101.25(1)°V = 3093(1) Å3. There are two independent but practically identical tetranuclear anions, each on a crystallographic inversion center. The short, unbridged Re-Re edges, to which triple bonds are assigned have lengths of 2.280(1) Å and 2.276(1) Å and the longer edges, each with a μ-Cl and a μ-O atom have lengths of 2.611(1) Å and 2.615(1) Å, for molecules 1 and 2 respectively. This anion completes a series going from [Re4Cl8(μ-O)2(μ-OMe)2]2− through [Re4Cl8(μ-O)2(μ-OMe)(μ-Cl)]2− to the present [Re4Cl8(μ-O)2(μ-Cl)2]2−. These metallocyclobutadiynes can be viewed as products of the 2,2-cycloaddition of two Re-Re quadruple bonds, but the mechanistic details of how they arise remain obscure.
Similar content being viewed by others
References
R. N. McGinnis, T. R. Ryan and R. E. McCarley (1978).J. Am. Chem. Soc. 100, 7900.
F. A. Cotton, and M. Shang (1991).J. Cluster Sci. 2, 121. A structure refinement taking account of disorder.
T. R. Ryan, R. E. McCarley (1982).Inorg. Chem. 21, 2072.
F. A. Cotton, and G. L. Powell (1983).Inorg. Chem. 22, 871.
R. E. McCarley, T. R. Ryan, and C C. Torardi (1981). ACS Symposium Series, No. 155, p. 41.
R. T. Carlin, and R. E. McCarley (1989).Inorg. Chem. 28, 3432.
J.-D. Chen, and F. A. Cotton (1991).J. Am. Chem. Soc. 113, 5857.
G. M. Sheldrick,SHELXS-86 Program for the Solution of Crystal Structures (University of Göttingen, 1986).
G. M. Sheldrick, SHELXL-93 (University of Göttingen. 1993).
F. A. Cotton, B. Hong, and M. Shang (1993).Inorg Chem. 32, 4876.
M. H. Chisholm, C. E. Hammond, M. Hampden-Smith, J. C. Huffman, and W. G. Van der Sluys (1987).Angew. Chem., Int. Ed. Engl. 26, 904.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Cotton, F.A., Dikarev, E.V. A new rectangular Re4 cluster compound of the metallocyclodiyne Type. J Clust Sci 6, 411–419 (1995). https://doi.org/10.1007/BF01165470
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01165470