(S)-1,2,4-Trimethylpiperazine-1,4-diium tetrachloridozincate(II)

(S)-1,2,4-Trimethyl­piperazine-1,4-diium tetra­chloridozincate(II)

In the title compound, (C(7)H(18)N(2))[ZnCl(4)], the Zn atom adopts a slightly distorted tetra-hedral geometry. The diprotonated piperazine ring adopts a chair conformation. In the crystal structure, the cations and anions are linked by inter-molecular N-H⋯Cl hydrogen bonds into a chain along [001].

(2R,2′S)-2,2′-Bi­piperidine-1,1′-diium dibromide

The title compound, C10H22N2 (2+)·2Br(-), was synthesized via reduction of 2,2'-dipyridyl with Ni-Al alloy/KOH, followed by separation of diastereoisomers (meso and rac) by recrystallization from ethanol. Although the two bridging C atoms are optically active, these two chiral centers adopt an (S,R) configuration; thus, the title compound contains an achiral meso form of 2,2'-bi-piperidine. Bot...

TOPOND 14 User ’ s Manual

Piperazine-1,4-diium diacetate

In the title salt, C(4)H(12)N(2) (2+)·2C(2)H(3)O(2) (-), the piperazine-1,4-diium cation has 2/m symmetry with the NH(2) unit located on a mirror plane and the acetate anion has m symmetry with all non-H atoms and one H atom located on a mirror plane. The piperazine ring adopts a chair conformation. In the crystal, the cations are linked with the anions via N-H⋯O hydrogen bonding into chains pa...

C S - 20 14 - 0 3 - 20 14

NoSQL databases are rapidly becoming the storage of choice for large-scale Web applications. However, for the sake of scalability these applications trade consistency for availability. In this paper, we regain control over this tradeoff by adapting an existing approach, version control (VC), to application state. By using VC, the data model is defined by the application and not by the database....