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Synthesis, Structure and Bonding in Pentagonal Bipyramidal Cluster Compounds Containing a cyclo -Sn 5 Ring, [(CO) 3 MSn 5 M(CO) 3 ] 4− (M = Cr, Mo).
- Source :
-
Inorganics . Jun2022, Vol. 10 Issue 6, p75. 12p. - Publication Year :
- 2022
-
Abstract
- In this paper, we report the synthesis and structural characterisation of two hetero-metallic clusters, [(CO)3CrSn5Cr(CO)3]4− and [(CO)3MoSn5Mo(CO)3]4−, both of which have a pentagonal bipyramidal core. The structures are similar to that of previously reported [(CO)3MoPb5Mo(CO)3]4− and our analysis of the bonding suggests that they are best formulated as containing Sn54− rings bridging two zerovalent M(CO)3 fragments. The electronic structure is compared to two isolobal M2E5 clusters, [CpCrP5CrCp]− and Tl77−, both of which show clear evidence for trans-annular bonds between the apical atoms that is not immediately obvious in the title clusters. Our analysis shows that the balance between E-E and M-M bonding is a delicate one, and shifts in the relative energies of the orbitals on the E5 and M2 fragments generate a continuum of bonding situations linked by the degree of localisation of the cluster LUMO. [ABSTRACT FROM AUTHOR]
- Subjects :
- *METAL carbonyls
*ELECTRONIC structure
Subjects
Details
- Language :
- English
- ISSN :
- 23046740
- Volume :
- 10
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Inorganics
- Publication Type :
- Academic Journal
- Accession number :
- 157764943
- Full Text :
- https://doi.org/10.3390/inorganics10060075