A new dinuclear amine-cobalt(III) complex containing two bridging amide ions

Solution structural characterization of an array of nanoscale aqueous inorganic Ga13−xInx (0 ≤ x ≤ 6) clusters by 1H-NMR and QM computations

“…Octahedral M(III) ions (M ¼ Al, Ga, Ir, Rh, and W), the most relevant for this work, tend to produce signals for m 2 -OH protons that range from 1.5-5.0 ppm, although this does not hold true for Co(III). [17][18][19][20][21] Geometries, chemical shi data, and available NMR conditions for these metal complexes are shown in Table 2. The majority of this data was referenced to TMS or residual protic peaks described in the primary papers.…”

“…As previously mentioned, octahedral Co(III) complexes differ from the other trivalent octahedral complexes with signals appearing between À4.5 and 0.5 ppm. [17][18][19][20][21] Mixed valence Os(0/II) compounds tend to have bridges in the À2.8 to À0.44 ppm range. 24,25 Square planar Pd(II) and Pt(II) complexes have m 2 -OH bridges that range from À3 to 2 ppm.…”

Enhanced Conductance via Induced Π-Stacking Interactions in Cobalt(II) Terpyridine Bridged Complexes

“…While the only bridging ligand available in the experiment was acetate (water was tested as a possible bridging ligand in this system and was shown to be ineffective), other bridged cobalt systems are well-known. − We therefore consider the bridging of two cobalt(II) ions bound to tridentate terpyridine units by alternative ligands. We consider below the transmission when the acetate ions are replaced by Cl − and NH 2 − , which are known to serve as bridging ligands. − The aim is to identify ligation chemistry leading to a further enhancement of the conductance.…”

“…We consider below the transmission when the acetate ions are replaced by Cland NH 2 -, which are known to serve as bridging ligands. [47][48][49][50] The aim is to identify ligation chemistry leading to a further enhancement of the conductance. For all of the considered bridged complexes (including the OAcbridged system), the ground-state is a triplet, which is not a surprising result as there are two five-coordinate cobalt(II) ions in each complex.…”

Synthesis, Structure, and Kinetics and Stereochemistry of Base-Catalyzed Hydrolysis of meso- and rac-[Co2(tmpdtne)Cl2]4+, Bis(pentaamine) Complexes Devoid of Deprotonatable NH Centers

“…Initially these were believed to be due to bridging OH, but they integrated for 2H and for a bis(pentaamine) species only a single OH bridge is possible. Very high field signals (<0 ppm) are characteristic of bridging OH, and it now seems terminal Co−OH are also at high field (but not as high field as bridging OH). There are few data for such complexes, but we have confirmed that the OH signal for [Co(NH 3 ) 5 OH](ClO 4 ) 2 measured in very dry Me 2 SO- d 6 is also to higher field of SiMe 4 (cf.…”