Synthesis and molecular structure of Cd9(OC2H4OMe)18,2HOC2H4OMe, the first cadmium aggregate based on oxygen donor ligands

Hierarchical Assembly of {Fe13} Oxygen‐Bridged Clusters into a Close‐Packed Superstructure

“…Modeling the magnetic susceptibility is not possible as 1) there is no analytical model available for 13 coupled Fe III centers in such a configuration and 2) numerical methods would require the diagonalization of too large a matrix. However, numerical density functional theory calculations on [Fe 19 (metheidi) 10 (m 3 -OH) 6 (m -OH) 8 (m 3 -O) 6 (H 2 O) 12 ]NO 3 (H 3 metheidi = N(CH 2 COOH) 2 (CH(Me)CH 2 CH 2 OH)), a molecule with the same brucite-core structure as seen in the {Fe 13 } aggregate, [21] were recently used to evaluate Fe III -Fe III magnetic coupling through different types of oxygen bridges. Herein, we suggest that the J 3 coupling through the m 3 -O bridge will be the strongest and will occur at around À100 K and that the J 2 coupling should be almost half of the J 1 coupling (namely, around À10 K compared with À20 K).…”

Synthesis, Crystal Structures and Photoluminescent Properties of Three Novel Cadmium(II) Compounds Constructed from 5‐Sulfoisophthalic Acid (H3SIP)

“…[21,22] The inorganic oxide layer contains two types of chair-like [Cd 4 (µ 3 -OH) 2 There are several compounds containing a chair-shaped tetranuclear cadmium cluster, [23][24][25] but those with two capping µ 3 -OH groups are rare. It is even more interesting that the [Cd 4 (µ 3 -OH) 2 ] cluster units are interconnected by the Cd(3)(µ 2 -OH) 2 (CO 2 ) unit into an unusual inorganic oxide layer.…”

How Do Clusters Grow? The Synthesis and Structure of Polynuclear Hydroxide Gallium(III) Clusters

“…Furthermore, the single crystals obtained for compound 3 were extremely small and weakly diffracting and the data were not of sufficient quality to allow complete analysis of the structure. Each Ga 13 cluster carries a +3 charge, so three counterions per cluster are expected. However, discrete nitrate ions could not be located in the Fourier difference map because of the weak reflections, the high symmetry of the space group, and the problems with solvent loss and crystal decay.…”

“…[17] An implication of this observation is that clusters grow by the addition of metal ions into the brucite lattice, but that this addition does not necessarily involve the sequential completion of shells. For example, only M 7 , M 13 , and M 19 clusters could have complete shells, and although these are observed, there are others-2, Ni 21 , [18] and Co 24 -, [19] which begin new growth shells before …”

“…Figure 3 shows a portion of the brucite lattice with the two clusters discussed herein highlighted. However, we can also pick out many other metal-oxo-hydroxide clusters that have been previously reported: M 7 , [9][10][11][12] Cd 11 , [13] Al 13 , [8] Fe 17 , [7,14,15] Fe 19 , [14,15] Mn 19 , [16] and Mn 21 . [17] An implication of this observation is that clusters grow by the addition of metal ions into the brucite lattice, but that this addition does not necessarily involve the sequential completion of shells.…”