Abstract[K+(2,2,2‐crypt)]2Ge92– containing the deltahedral Zintl anion Ge92– has been isolated from a solution of K4Ge9 in ethylenediamine in the presence of 2,2,2‐crypt, intended as an intermediate in mixed‐cluster synthesis. The subsequent crystallographic characterisation shows the closo‐Ge92– cluster unit to be tricapped trigonal‐prismatic with a symmetry very close to D3h. Each Ge92– unit is surrounded by two 2,2,2‐crypt units, each with a chelated K+ cation, viz. [K+(2,2,2‐crypt)]. The structure characterisation of this ordered Ge92– cluster is surprisingly enough the first one reported. A chemical bonding analysis reveals two local minima of D3h symmetry, with that of lowest energy being highly similar to that resulting from the crystallographic analysis of low‐temperature data. The cluster interaction scheme is based on highly delocalised bonding.
Dichloromethane (DCM), CH(2)Cl(2) has been identified as an alternative reaction medium for room-temperature synthesis of subvalent homopolyatomic clusters of the group 15 element bismuth.
Structural Investigation of a Fully OrderedCluster in the Compound [K + (2,2,2-crypt)]2 . -Single crystals of the title compound are isolated from a solution of K4Ge9 and 2,2,2-crypt in en at room temperature. The structure is determined at 100 K (monoclinic, space group C2/c, Z = 4) and 250 K (trigonal, P3c1, Z = 2). The fully ordered low-temperature structure contains tricapped trigonal-prismatic clusters with a symmetry very close to D 3h . The room-temperature structure agrees very well with previously published reports indicating an order/disorder transition between 100 K and 250 K. -(AKERSTEDT, J.; PONOU, S.; KLOO, L.; LIDIN*, S.; Eur. J. Inorg. Chem. 2011, 26, 3999-4005, http://dx.doi.org/10.1002/ejic.201100447 ; Div. Polym. Mater. Chem., Lund Univ., S-221 00 Lund, Swed.; Eng.) -Schramke 46-005 closo-Ge 2-9
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