Titanocene sulfide chemistry

• Titanocene complexes with hydrosulfide, sulfide or thiolate ligands are reviewed.
• Preparations and reactivity of titanocene sulfide compounds are described.
• This review summarizes the development and current progress in this field.

This review is focused on the chemistry of titanocene sulfide compounds. The linking element for all compounds discussed in this review is the presence of a bent titanocene fragment consisting of two aromatic cyclopentadienyl rings and one electron deficient central titanium atom coordinated between them. Several types of sulfur ligands bonding to titanocene fragment, such as hydrosulfide, sulfide or thiolate are described, as well as the various types of sulfur ligand functions in titanocene complexes have been observed. The titanocene sulfide chemistry is more than fifty years old, but since it is still evolving, it offers a plethora of surprises and challenges.

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