In the area of metal cluster chemistry, a butterfly cluster compound usually describes tetrametallic clusters containing five M-M bonds. A prototype of this motif is [Re4(CO)16]2−. Most butterfly clusters have additional bridging ligands. One example is the pentaphosphide [[Rh4(CO)5(PPh2)5]]− where all Rh---Rh edges are bridged by PPh2. A carbide-containing butterfly cluster is [Fe4C(CO)12]2− where the carbide is bonded to all four Fe centers.[2]
Structure of [Re4(CO)16]2−, a butterfly cluster.[1]
Bonding in such clusters is often discussed in the context of polyhedral skeletal electron pair theory. This theory predicts that tetrametallic clusters with 60 valence electrons will adopt tetrahedral geometry with six M-M bonds. Tetrahedral clusters is classified as nido clusters. By addition of 2e, the 60e cluster opens one edge, as manifested in the butterfly motif.
Referencesedit
^Bau, Robert.; Fontal, Bernardo.; Kaesz, Herbert D.; Churchill, Melvyn R. (1967). "Preparation and Configuration of the [Re4(CO)16]2- Anion. A Planar, Triangulated, Rhenium Carbonyl Cluster". Journal of the American Chemical Society. 89 (24): 6374–6376. doi:10.1021/ja01000a082.
^Sappa, E.; Tiripicchio, A.; Carty, A. J.; Toogood, G. E. (1987). "Butterfly Cluster Complexes of the Group VIII Transition Metals". Progress in Inorganic Chemistry. 35: 437. doi:10.1002/9780470166369.ch5. ISBN9780470166369.
March 17, 2024
butterfly, cluster, compound, area, metal, cluster, chemistry, butterfly, cluster, compound, usually, describes, tetrametallic, clusters, containing, five, bonds, prototype, this, motif, most, butterfly, clusters, have, additional, bridging, ligands, example, . In the area of metal cluster chemistry a butterfly cluster compound usually describes tetrametallic clusters containing five M M bonds A prototype of this motif is Re4 CO 16 2 Most butterfly clusters have additional bridging ligands One example is the pentaphosphide Rh4 CO 5 PPh2 5 where all Rh Rh edges are bridged by PPh2 A carbide containing butterfly cluster is Fe4C CO 12 2 where the carbide is bonded to all four Fe centers 2 Structure of Re4 CO 16 2 a butterfly cluster 1 Bonding in such clusters is often discussed in the context of polyhedral skeletal electron pair theory This theory predicts that tetrametallic clusters with 60 valence electrons will adopt tetrahedral geometry with six M M bonds Tetrahedral clusters is classified as nido clusters By addition of 2e the 60e cluster opens one edge as manifested in the butterfly motif References edit Bau Robert Fontal Bernardo Kaesz Herbert D Churchill Melvyn R 1967 Preparation and Configuration of the Re4 CO 16 2 Anion A Planar Triangulated Rhenium Carbonyl Cluster Journal of the American Chemical Society 89 24 6374 6376 doi 10 1021 ja01000a082 Sappa E Tiripicchio A Carty A J Toogood G E 1987 Butterfly Cluster Complexes of the Group VIII Transition Metals Progress in Inorganic Chemistry 35 437 doi 10 1002 9780470166369 ch5 ISBN 9780470166369 Retrieved from https en wikipedia org w index php title Butterfly cluster compound amp oldid 1151902887, wikipedia, wiki, book, books, library,
