Preparation of Cyanoguanidine and Ethylcyanamide Complexes of Ruthenium(II) and Osmium(II)

Abstract

A selective route: Hypermetallyl germanium(II) and tin(II) compounds (see scheme) were prepared using dimetallyl magnesium reagents and were fully characterized. These derivatives, which contain good leaving substituents, might be suitable candidates for the preparation of nanomaterial alloys.

Preparation of imine complexes of ruthenium and osmium stabilised by [MCl(η 6-p-cymene)(PR3)]+ fragments

“…These bond lengths are close to those in other related complexes [14,23,24] and also show the different trans effect of the other ligands. Ru-C(4) and Ru-C(3), trans to the phosphorus atom, are the longer ones.…”

“…The Ru-Cl bond length is 2.393(2) Å, matching literature values well [14,23,24], and does not require further comment. The Ru-P bond length, 2.293(2) Å, is slightly shorter than lengths found for other phosphine RuCl(p-cymene) complexes [24a,28], but longer than that of the phosphito compound [Ru(g 6 -p-cymene)(-P{OPh} 3 )Cl 2 ], 2.2642(8) Å [29].…”

Preparation of Pyrazole–Pyrazolate Half‐Sandwich Complexes of Ruthenium and Osmium

“…[11] We have now extended these studies to include HRpz and HIm ligands, and here we report the synthesis and characterisation of some azole and of the first pyrazolepyrazolate half-sandwich complexes of the iron triad.…”

“…In a mixture of ethanol and dichloromethane, the reaction gave the new pyrazole-pyrazolate cations [M(Rpz)(η 6 -pcymene)(HRpz)L] + (11)(12)(13)(14), which were isolated as BPh 4 salts and characterised (Scheme 3).…”

Preparation and reactivity of half-sandwich hydrazine complexes of ruthenium and osmium

“…This may be an effect of the different arrangement of the ligands around the metal (see below). In any case, these values are in average slightly shorter than those found in other p-cymene ruthenium complexes [15,38,39]. The Ruecentroid arene ring distances are 1.7085(5) and 1.7152(5) Å, respectively, also perhaps as a consequence of the different arrangement of the ligands around the metal.…”