Preparation and Properties of a Crystalline Compound Na₄Sn₉ · 6–8 Ethylenediamine

Abstract

About 40 years ago Zintl and his co-workers discovered a class of salt-like intermetallic compounds that are soluble in liquid ammonia. This class includes Na4Sn9, Na4Pb9, and Na3Sb7 which exist in solution as Na' cations and complex anions such as Pbt-. At that time Zintl proposed the designation polyanionous salts for such compounds.

Design of Three-shell Icosahedral Matryoshka Clusters A@B12@A20 (A = Sn, Pb; B = Mg, Zn, Cd, Mn)

“…However, definitive structure determinations of these clusters became possible only in the 1970s, when Kummer and Diehl reported the first structurally-authenticated Zintl anion cluster of Na 4 Sn 9 5. The original post-transition element clusters were empty, i. e., they contained no interstitial atoms in the center of the cluster polyhedron.…”

The Cluster Anion Si94−

“…These anions form monocapped square antiprisms (SAPRS-9)Ðthat is, the framework of a 22e nido-E 10 Wade clusterÐas shown by the investigations of Kummer et al, [1] Corbett et al, [2] and Fässler et al [3] Until recently, it appeared certain that these cluster anions are only formed by the reactions of intermetallic phases with suitable solvents. [4] However, the existence of the isolated anions in these binary phases of the alkali metals M Na, K, Rb, Cs was then established.…”

“…Variations of COMMUNICATIONS Self-Organization of a Heteroditopic Molecule to Linear Polymolecular Arrays in Solution** Nori Yamaguchi, Devdatt S. Nagvekar, and Harry W. Gibson* Nature displays a variety of supramolecular structures within a scale of 1 to 100 nm, beautifully put together with relatively simple building blocks by means of self-organization. [1] Over the last few decades chemists have elegantly adopted a variety of noncovalent bonding interactions to construct supramolecular architectures in the way that Nature does it. [2] The versatility and efficiency of utilizing such noncovalent forces [3] inspired us to design and to prepare a heteroditopic molecule to create linear oligo-and polymolecular arrays self-organized in solution by host ± guest complexation.…”

Polyhedral nine-atom clusters of tetrel elements and intermetalloid derivatives

“…The imagination of tetrel element polyanions was finally verified by the crystal structure determination of a [Sn 9 ] 4− ion in 1976 (Kummer & Diehl 1970) and ever since has developed into a fast growing research field (Corbett 1985;Fässler 2001).…”