THE ASYMMETRIC UNIT OF THE TITLE COMPOUND [SYSTEMATIC NAME: benzamidinium 3,3',5,5'-tetra-hydr-oxy-1,1'-spirobi[2,4,6-trioxa-1,3,5-triboracyclo-hexa-ne](1-) sesquihydrate], C(7)H(9)N(2) (+)·B(5)H(4)O(10) (-)·1.5H(2)O, is composed of two protonated benzamidinium cations, two tetra-hydro-penta-borate anions and three water mol-ecules of crystallization. The ions and water molecules are associated...

The reaction of 2-acetylpyridine with silver(I) tetra-fluorido-borate leads to the discrete title complex, [Ag(C(7)H(7)NO)(2)]BF(4), in the cation of which the Ag atom is coordinated by two 2-acetylpyridine ligands, each of which is N,O-bidentate, albeit with stronger bonding to the N atoms [Ag-N = 2.2018 (15) and 2.2088 (14) Å; Ag-O = 2.5380 (13) and 2.5454 (13) Å]. The four-coordinate Ag atom...

The title compound, Li(+)·C(2)BF(2)O(4) (-)·2C(4)H(8)O(2)S, is a dimeric species, which resides across a crystallographic inversion center. The dimers form eight-membered rings containing two Li(+) cations, which are joined by O(2)S sulfone linkages. The Li(+) cations are ligated by four O atoms from the anions and solvent mol-ecules, forming a pseudo-tetra-hedral geometry. The exocyclic coordi...

1. The rate of the saponification of iodoacetic acid in sodium hydroxide and alkaline buffer solutions yielding glycollic acid was measured by means of Heyrovský's polarographic method. 2. From the bimolecular velocity constants, increasing with the ionic strength of the solution, the Brönsted factor, F, which characterizes the primary salt effect, was calculated. 3. In the borate buffer soluti...

Intramolecular hydroxyl attack upon iron-coordinated nitriles in a {closo-2,1,10-FeC2B7} system forms imidates that allow construction of a tetra-cluster {FeC2B7}-{C2Co2}-{C2Co2}-{FeC2B7} molecule.

The mononuclear copper title complex {N,N,N',N'-tetra-kis-[(6-methyl-pyridin-2-yl)meth-yl]ethane-1,2-di-amine-κ6N}copper(II) bis-(tetra-fluorido-borate), [Cu(C30H36N6)](BF4)2, is conveniently prepared from the reaction of Cu(BF4)2·6H2O with N,N,N',N'-tetra-kis-[(6-methyl-pyridin-2-yl)meth-yl]ethane-1,2-di-amine (tmpen) in aceto-nitrile at room temperature in air. The complex shows a distorted o...

In the crystal structure of the title compound, C(18)H(19)N(2)O(+)·BF(4) (-), bifurcated N-H⋯(F,F) hydrogen bonds link the protonated 4'-morpholine-methyl-biphenyl-2-carbonitrile cations and slightly distorted tetra-fluoro-borate anions. π-π inter-actions [centroid-centroid distance = 3.805 (3) Å] help to consolidate the packing. The dihedral angle between the benzene rings in the cation is 57....

The title salt, C24H24N(+)·BF4 (-), is one of two possible dias-tereoisomers having a different configuration of the asymmetric centre in the α-phenyl-ethyl substituent, whose absolute configuration was established to be R. The two phenyl substituents of the cation have a cofacial orientation, albeit with a long centroid-centroid separation of 4.129 (3) Å. The crystal structure exhibits numerou...

The title compound, C9H10N4O, was obtained unintentionally by hydrolysis of 4-amino-1-benzyl-5-methyl-sulfanyl-1,2,4-triazolium tetra-fluoro-borate in the presence of sodium azide. In the crystal, alternating layers of polar amino-triazolinone and apolar benzene moieties are observed. N-H⋯O hydrogen bonds between the amino and carbonyl groups form infinite chains along [010]. These infinite cha...

The title compound, C(7)H(15)N(3)P(+)·BF(4) (-) or [PTA-Me][BF(4)], is the N-methyl-ated derivative of the well known water-soluble amino-phosphine 1,3,5-triaza-7-phosphaadamantane (PTA). The asymmetric unit consists of a cage-like cation [PTA-Me](+) and a disordered tetra-fluoro-borate anion; two F atoms are disordered equally over two sites. A network of weak inter-molecular C-H⋯F hydrogen bo...