Cationic ruthenium(II) systems. Part 1. The preparation and reactivity of diene(hydrazine)ruthenium(II) cations, and the formation of aminobonded hydrazone complexes

Synthesis and X-ray studies of ruthenium(II) complexes containing hydrazine and benzyl isocyanide ligands

“…The Ru atom was also modelled as disordered over two positions in a 89:11 ratio. Tetraphenylborate was the only counter anion that effected precipitation and attempts to isolate the cations of 2 with other anions such as [BF 4 ] -and [PF 6 ] -were not successful, consistent with earlier reports [3]. Complex 2 is stable in air and light for a period of six weeks after which slow decomposition starts to occur.…”

“…Anhydrous hydrazine is a highly regulated product; the use of hydrated hydrazine was therefore investigated. We (3). Our studies showed that the hydrated hydrazine, a commercially available reagent, can be used to prepare the Ru(II)-hydrazine complexes.…”

“…Melting points were obtained on a Kofler hot-stage apparatus and were uncorrected. The hydrazine complex was prepared from the polymer [{RuCl 2 (COD)} x ] by the modification of a published procedure [3] …”

“…The polymeric compound [{RuCl 2 (COD) x }] has attracted particular attention due to the lability of the η 4 -coordinated COD ligands, which are able to undergo exchange reactions under very mild conditions [2]. This unique property has been widely applied in numerous ligand exchange processes, making the polymer an ideal precursor for the synthesis of an extensive range of active ruthenium(II) compounds [3][4][5][6].…”

“…In previous reports, anhydrous hydrazine and substituted hydrazine were used to prepare the hydrazine complexes [3,12]. Anhydrous hydrazine is a highly regulated product; the use of hydrated hydrazine was therefore investigated.…”