The asymmetric unit of the title salt, C10H20N3O2 (+)·C24H20B(-), contains two cations and two tetra-phenyl-borate ions. The C-N bond lengths in the central CN3 unit of the guanidinium ions range between 1.323 (2) and 1.381 (2) Å, indicating partial double-bond character. The central C atoms are bonded to the three N atoms in a nearly ideal trigonal-planar geometry and the positive charge is de...

Two new penta-borates, tris-odium zinc cadmium penta-borate, Na3Zn0.912Cd0.088B5O10, and tris-odium zinc magnesium penta-borate, Na3Zn0.845Mg0.155B5O10, have been synthesized by high-temperature solution reactions at 1023 K. Their crystal structures were determined by single-crystal X-ray diffraction. Both solid solutions crystallize in the ortho-rhom-bic form of the parent compound Na3ZnB5O10 ...

In the title mononuclear complex, [Ag(C(10)H(6)N(4))(2)]BF(4), the Ag(I) atom adopts a square-planar N(4 )coordination geometry and is surrounded by two 5-(2-pyrid-yl)pyrazine-2-carbonitrile ligands. The tetra-fluorido-borate anions link the mononuclear cations through inter-molecular C-H⋯F hydrogen-bonding inter-actions, forming an infinite tape structure along [110]. Other weak inter-actions ...

In the title compound, [Cu(2)(C(10)H(12)O(4))(C(12)H(8)N(2))(2)(H(2)O)(2)](BF(4))(2)·H(2)O, the two Cu atoms are each chelated by the acetyl-acetonate unit of the 3,4-diacetyl-hexa-2,4-diene-2,5-diolate (tae) ligand. The Cu atoms are square-pyramidally penta-coordinated, with one bidentate 1,10-phenanthroline (phen) and the tae ligand basal and one water mol-ecule apical. The pyridyl rings of t...

In the title salt (2S,4S,8R)-1-butyl-2-[(R)-(hydr-oxy)(6-methoxy-quinolin-4-yl)meth-yl]-8-vinyl-quinuclidin-1-ium tetra-fluoro-borate, C(24)H(33)N(2)O(2) (+)·BF(4) (-), the butyl substituent at the 1-position is in an equatorial conformation with respect to the unsubstituted six-membered ring and the four butyl C atoms are almost coplanar with the ring N and vinyl C atoms (r.m.s. deviation = 0....

Nearly 100% 5'-position selectivity of transglucosylation from maltodextrin to pyridoxine (PN) by cells of Verticillium dahliae TPU 4900 was observed when the reaction was carried out with borate. The same effect of borate was observed not only during synthesis of pyridoxine 5'-alpha-D-glucoside by partially purified enzyme of this strain but also during synthesis of this compound by other micr...

The title imidazolium-based ionic-liquid salt, C(18)H(24)N(4) (2+)·2BF(4) (-), has the cation lying about a center of inversion. The five-membered imidazole ring is approximately perpendicular to the six-membered phenyl-ene ring [dihedral angle = 86.9 (1)°]. The tetra-fluoro-borate anion is disordered over two sites in a 0.722 (3):0.278 (3) ratio.

In the title tris-(pyrazol-yl)borate (Tp(Ph2)) complex, [NiBr(C(45)H(34)BN(6))], the Ni, Br and B atoms lie on a crystallographic threefold axis and a distorted NiN(3)Br tetra-hedral geometry arises for the metal ion. In the crystal, C-H⋯(C=C) and C-H⋯π inter-actions help to establish the polar crystal packing.

The phosphine-coordinated Ag(I) atom in the title compound, [Ag(C(21)H(17)BN(6))(C(18)H(15)P)], is also N,N',N''-chelated by the tris-(indazol-yl)borate anion. The resultant N(3)P coordination geometry is tetra-hedral.

The title compound 2C(8)H(14)N(2) (2+)·[B(14)O(20)(OH)(6)](4-), contains diprotonated C(8)H(14)N(2) (2+) cations and centrosymmetric tetra-deca-borate anions. The crystal structure is stabilized by O-H⋯O and N-H⋯O hydrogen bonds.