We have synthesized in a single-step procedure from available copper(I) precursor at RT two Cu(I) thiolato clusters of the formula [Cu4(μ-SCH(CH3)2)6]2- and [Cu5(μ-SC(CH3)3)6]- as revealed by X-ray crystallography, where increased steric bulk leads to a bigger cage with some two-coordinate metal centers. In addition, we identified a mononuclear two coordinate thiolato complex with the bulkier ligand, of the formula NEt4[Cu(SC(CH3)3)2]. This is only the second example of such a complex of an aliphatic ligand that is structurally characterized. The X-ray structure reveals an S-Cu-S angle of 176.7-179.5°, with Cu-S distances of 2.14 Å.
Bibliographical noteFunding Information:
We thank the Human Frontier Science Program for financial support. We also thank Dr. Shmuel Cohen for solution of the X-ray structures.
- Cluster compounds
- Coordination modes
- Copper metallochaperones
- S ligands