Identifying efficient ways to easily access libraries of metal-based compounds has received a lot of attention. The post-functionalization of organometallics, also called 'chemistry on the complex', can be used to develop new types of ruthenium conjugates in a convenient manner and can be extended to larger series of derivatives . This modular strategy allows to introduce the variability in a late synthetic stage , but it requires high stability of the metal containing precursor withstanding reaction conditions used for the post-coordination chemistry .