ChemInform Abstract: Sulfato Complexes of Ruthenium with a Ruthenium‐Ruthenium Bond.

Abstract

The ruthenium complexes (IV) are prepared as shown in the scheme.

Metal−Metal Multiply-Bonded Complexes of Technetium. 4.1 Photodissociation of the Tc≡Tc Triple Bond in [Tc2(CH3CN)10][BF4]4

“…A slight distortion of the N−Tc−N angles from 90° results in the lowering of the idealized molecular symmetry from O h symmetry to the crystallographically imposed C i symmetry. The three crystallographically independent Tc−N bond distances of 2.062(4), 2.062(3), and 2.062(4) Å are only slightly longer than those reported for [Ru(CH 3 CN) 6 ] 2+ (2.013−2.032 Å) and are similar to those found for the equatorial acetonitrile ligands of [Tc 2 (CH 3 CN) 8 (O 3 SCF 3 ) 2 ][BF 4 ] 2 (Tc−N avg = 2.08(1) Å) 1b. The dimensions of the coordinated acetonitrile ligands fall within the expected ranges.…”

“…The reduction process occurs at a slightly less negative potential than that of the metal−metal bonded species 1 ( E 1/2 , red = −0.82 V vs Cp 2 Fe) 1b. The presence of the oxidation couple is noteworthy since such a process does not occur for 1 and was not reported in the cyclic voltammogram of [Ru(CH 3 CN) 6 ] 2+ 8a…”

Tuning the Magnetic Moment of [Ru2(DPhF)3(O2CMe)L]+ Complexes (DPhF=N,N′‐Diphenylformamidinate): A Theoretical Explanation of the Axial Ligand Influence

“…[13,14] On the other hand, the substitution of the carboxylate groups by triazenide ligands (N 3 R 2 À ) in the reduced Ru 2 4 + species leads to diamagnetic species, such as […”

Ruthenium Compounds

“…83,84 The room temperature magnetic moments of both the K + and Cs + salts were ~4.5 BM which is in accordance with the presence of four unpaired electrons and the 2 4 * 2 * electronic confi guration.…”

“…These Ru 2 5+ tetracarbonates have been used as starting materials for the preparation of K 3 [Ru 2 (SO 4 ) 4 (Table 9.1), are slightly longer than the corresponding Ru-Ru distances in Ru 2 5+ tetracarboxylates and tetracarbonates, but they are still in the typical range for Ru 2 5+ compounds with three unpaired electrons and the 2 4 2 ( * *) 3 electronic confi guration, as it is indicated by the room temperature magnetic 82,84 The related Ru 2 5+ compound with bridging phosphonate ligands (NH 4 ) 3 [Ru 2 (hedp) 2 ]·2H 2 O has been synthesized by the hydrothermal reaction between RuCl 3 ·xH 2 O and H 4 hedp·H 2 O. 85 It exhibits a two-dimensional layer structure similar to those of K 3 [Ru 2 (O 2 CO) 4 ]·4H 2 O and Na 3 [Ru 2 (O 2 CO) 4 ]·6H 2 O, with a Ru-Ru bond length of 2.347(1) Å (Table 9.1).…”