Open Network Architectures from the Self‐Assembly of AgNO₃ and 5,10,15,20‐Tetra(4‐pyridyl)porphyrin (H₂tpyp) Building Blocks: The Exceptional Self‐Penetrating Topology of the 3D Network of [Ag₈(Zn^IItpyp)₇(H₂O)₂](NO₃)₈

Abstract

The use of suitable predetermined building blocks has assumed an increasing relevance in recent times in the crystal engineering of coordination frameworks [1] that have potential interest as zeolite-like materials. [2] In this regard, much d) N. ] Racemic 1 was prepared by the lithiation of 2-alkynyl-5bromopyrimidine followed by treatment with 2-methylpropanal.[8] Preparation of (S)-1 with ca. 0.00005 % ee. Pyrimidyl alkanol (S)-1 (1.5 mg, > 99.5 % ee) was dissolved in ethyl acetate (or benzene) to make a standardized solution of (S)-1 (3.2 î 10 À6 mol L À1 ). The solution (50 mL) was added to a solution of racemic 1 (75.1 mg) in ethyl acetate (or benzene). Then, a part of the solution was transferred to another flask, and the removal of solvent gave (S)-1 with ca. 0.00005 % ee (9.9 mg). Dissolution of the whole (S)-1 in 4.3 mL of cumene produced a 9.9 î 10 À3 m solution of (S)-1 with ca. 0.00005 % ee. [9] a) K. Soai, S. Niwa, Chem. Rev. 1992, 92, 833 ± 856; b) L. Pu, H.-B. Yu, Chem. Rev. 2001, 101, 757 ± 824. [10] After our experiments were completed, Singleton and Vo reported asymmetric autocatalysis using (R)-(2-methylpyrimidyl)alkanol [5b] with the order of 10 À5 % ee [a) D. A. Singleton, L. K. Vo, J. Am. Chem. Soc. 2002, 124, 10 010 ± 10 011]. However, they used only the catalyst with the R configuration. We believe that it is essentially important to examine the asymmetric autocatalysts of both configurations. The reasons are as follows:1) The chirality level of the catalyst on the order of 10 À5 % ee is Sato,

Vertex-, face-, point-, Schläfli-, and Delaney-symbols in nets, polyhedra and tilings: recommended terminology

“…Note that adherence to cyclic order is necessary to distinguish the nets of the 2-periodic tilings 3 3 . 4 2 .…”

Crystalline‐State Reaction with Allosteric Effect in Spin‐Crossover, Interpenetrated Networks with Magnetic and Optical Bistability

“…The resulting 4-connected 3D network corresponds to the expanded version of the prototypical CdSO 4 net decorated by the coordinating water molecules and the pmd ligands (Figure 1 a). [16,17] The much larger intraframework spaces are occupied by two other identical but independent networks, which interpenetrate the first network and each other ( Complete and rapid loss of both ligated and nonbonded water molecules occurs simultaneously in the temperature range 345-399 K (1 Ag) and 323-382 K (1 Au). X-ray powder diffraction spectra (XRPD) were recorded on 1 Au at 290 K and 373 K at ambient pressure and at 290 K under vacuum.…”

Formation of Au and tetrapyridyl porphyrin complexes in superfluid helium

“…[15][16][17] In contrast, when the order of addition is reversed, different structures might result because all of the lone electron pairs on the four pyridyl nitrogen atoms are available for bonding. In addition, superfluid helium droplets are able to remove the binding energy released during the aggregation, allowing the structures to be stabilized with Au atoms bonded to different pyridyl nitrogen atoms.…”

“…Potentially, the concept could be developed to construct metalorganic superstructures bridged by metal clusters rather than a single metal atom. [15][16][17] Figure Captions …”