(E)-2-(4-Hy-droxy-3-meth-oxy-benzyl-idene)hydrazinecarboxamide.

The asymmetric unit of the title compound, C(9)H(11)N(3)O(3), consists of two crystallographically independent mol-ecules. Both mol-ecules are almost planar, with r.m.s. deviations of 0.107 and 0.099 Å. In the crystal, the two independent mol-ecules form a dimer with an R(2) (2)(8) ring motif via N-H⋯O hydrogen bonds. The dimers are further linked into a three-dimensional network by O-H⋯O and N-H⋯O hydrogen bonds.

2-Hy-droxy-2-(3-oxobutan-2-yl)indan-1,3-dione.

In the indane ring system of the title mol-ecule, C(13)H(12)O(4), the hy-droxy-bearing C atom is 0.134 (1) Šout of the plane of the remaining essentially planar atoms (r.m.s. deviation = 0.010 Å). In the crystal, mol-ecules are linked into chains along the b axis by inter-molecular O-H⋯O hydrogen bonds. Additional stabilization is provided by weak inter-molecular C-H⋯O hydrogen bonds.

Cyclo-benzaprinium salicylate.

In the title mol-ecular salt [systematic name: 3-(5H-di-benzo[a,d]cyclo-hepten-5-yl-idene)-N,N-dimethyl-1-propanaminium 2-hy-droxy-benzoate], C(20)H(22)N(+)·C(7)H(5)O(3) (-), the benzene rings of the cyclo-benzaprinium cation are inclined with a dihedral angle of 61.66 (7)°. An intra-molecular O-H⋯O hydrogen bond occurs within the salicylate anion, generating an S(6) ring. In the crystal, the cation and anion are linked by an N-H⋯O inter-action.

9-(3,4-Dimeth-oxy-phen-yl)-3,3,6,6-tetra-methyl-4,5,6,9-tetra-hydro-3H-xanthene-1,8(2H,7H)-dione.

The asymmetric unit of the title xanthene compound, C(25)H(30)O(5), contains two mol-ecules in which the pyran ring and the dimeth-oxy-phenyl ring are nearly perpendicular to one another [dihedral angles = 86.81 (8) and 84.45 (9)°]. One of the meth-oxy groups in one mol-ecule is twisted away from the phenyl ring [C-O-C-C torsion angle = -103.40 (16)°]. The pyran ring adopts a boat conformation whereas the two fused cyclo-hexane rings adopt envelope conformations in both mol-ecules. In the crystal, mol-ecules are linked into a three-dimensional network by C-H⋯O hydrogen bonds.

4-(5,6-Dihydro-benzimidazo[1,2-c]quinazolin-6-yl)benzene-1,3-diol dimethyl sulfoxide monosolvate.

In the title solvated benzimidazole compound, C(20)H(15)N(3)O(2)·C(2)H(6)OS, both the benzimidazole fused-ring system and the complete dimethyl sulfoxide solvent mol-ecule are disordered over two sets of sites, in 0.750 (5):0.250 (5) and 0.882 (4):0.118 (4) ratios, respectively. The conformation of the pyrimidine ring is close to a half-chair for the major disorder component, whereas for the minor component it is close to a boat. The dihy-droxy-phenyl ring is almost perpendicular to the mean plane of the benzimidazole ring [dihedral angle = 87.3 (2)° for the major disorder component and 88.3 (5)° for the minor disorder component]. In the crystal, mol-ecules are linked into layers parallel to (110) by O-H⋯N and C-H⋯O hydrogen bonds. A bifurcated O-H⋯(O,S) bond links the benzimidazole and solvent mol-ecules.

2-(4-Bromo-phen-yl)-2-oxoethyl 4-chloro-benzoate.

The asymmetric unit of the title compound, C(15)H(10)BrClO(3), consists of three crystallographically independent mol-ecules. The dihedral angles between the benzene rings in the three mol-ecules are 68.8 (2), 0.7 (3) and 66.1 (2)°. In the crystal, the three independent mol-ecules are inter-connected by C-H⋯O hydrogen bonds, leading to isolated trimers.

[µ-Bis(diphenyl-phosphan-yl)ethane-1:2κP:P']nona-carbonyl-1κC,2κC,3κC-[tris-(4-(meth-oxy-phen-yl)arsane-3κAs]-triangulo-triruthenium(0) chloro-form monosolvate.

The asymmetric unit of the title triangulo-triruthenium compound, [Ru(3)(C(21)H(21)AsO(3))(C(26)H(24)P(2))(CO)(9)]·CHCl(3), consists of one mol-ecule of the triangulo-triruthenium complex and one chloro-form solvent mol-ecule. The bis(diphenyl-phosphan-yl)ethane ligand bridges an Ru-Ru bond and the monodentate arsane ligand bonds to the third Ru atom. Both the arsane and phosphine ligands are equatorial with respect to the Ru(3) triangle. Additionally, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. The three arsane-substituted benzene rings make dihedral angles of 52.72 (19), 63.03 (19) and 88.19 (19)° with each other. The dihedral angles between the two benzene rings are 85.8 (2) and 89.2 (2)° for the two diphenyl-phosphanyl groups. In the crystal, mol-ecules are linked together into a three-dimensional network via inter-molecular C-H⋯O hydrogen bonds. Weak inter-molecular C-H⋯π inter-actions further stabilize the crystal structure.

[µ-Bis(diphenyl-phosphan-yl)ethane-1:2κP:P']nona-carbonyl-1κC,2κC,3κC-(triphenyl-stibine-3κSb)-triangulo-triruthenium(0).

The asymmetric unit of the title triangulo-triruthenium compound, [Ru(3)(C(26)H(24)P(2))(C(18)H(15)Sb)(CO)(9)], consists of two crystallographically independent mol-ecules, A and B. The bis-(diphenyl-phosphan-yl)ethane ligand bridges an Ru-Ru bond and the monodentate stibine ligand bonds to the third Ru atom. Both the stibine and phosphine ligands are equatorial with respect to the Ru(3) triangle. Additionally, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. The three stibine-substituted benzene rings make dihedral angles of 38.7 (3), 71.5 (3) and 70.0 (3)° with each other in mol-ecule A whereas these angles are 83.9 (3), 88.2 (3) and 56.8 (3)° in mol-ecule B. Similarly, the dihedral angles between the two benzene rings are 80.7 (3) and 87.6 (3)° for the two diphenyl-phosphanyl groups in mol-ecule A and 84.0 (3) and 72.6 (4)° in mol-ecule B. In the crystal, mol-ecules are linked into tetra-mers via inter-molecular C-H⋯O hydrogen bonds. Weak inter-molecular C-H⋯π inter-actions further stabilize the crystal structure.

[µ-Bis(diphenyl-arsan-yl)methane-1:2κAs:As']nona-carbonyl-1κC,2κC,3κC-[tris-(biphenyl-4-yl)arsane-3κAs]-triangulo-triruthenium(0).

In the title triangulo-triruthenium compound, [Ru(3)(C(25)H(22)As(2))(C(36)H(27)As)(CO)(9)], the bis-(diphenyl-arsan-yl)methane ligand bridges an Ru-Ru bond and the monodentate arsine ligand bonds to the third Ru atom. Both arsine ligands are equatorial with respect to the Ru(3) triangle. In addition, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. The phenyl rings of biphenyl are twisted from each other by dihedral angles of 50.5 (2), 44.5 (2) and 27.8 (2)°. The arsine-substituted phenyl rings make dihedral angles of 61.56 (18), 89.36 (18) and 83.27 (18)° with each other. The dihedral angles between the two benzene rings are 87.5 (2) and 81.95 (19)° for the two diphenyl-arsanyl groups. In the crystal, mol-ecules are linked into dimers by inter-molecular C-H⋯O hydrogen bonds. Weak inter-molecular C-H⋯π and π-π [centroid-centroid distance = 3.601 (3) Å] inter-actions stabilize the crystal structure.

[µ-Bis(diphenyl-phosphan-yl)methane-1:2κP:P']nona-carbonyl-1κC,2κC,3κC-[tris-(biphenyl-4-yl)arsane-3κAs]-triangulo-triruthenium(0).

In the title triangulo-triruthenium compound, [Ru(3)(C(36)H(27)As)(C(25)H(22)P(2))(CO)(9)], the bis-(diphenyl-phosphan-yl)methane ligand bridges an Ru-Ru bond and the monodentate arsine ligand bonds to the third Ru atom. Both the arsine and phosphine ligands are equatorial with respect to the Ru(3) triangle. In addition, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. In each biphenyl unit, the phenyl rings are twisted from each other, making dihedral angles of 51.22 (18), 42.94 (16) and 26.95 (16)°. The arsine-substituted phenyl rings make dihedral angles of 61.22 (15), 87.17 (15) and 83.32 (15)° with each other. The dihedral angles between the two benzene rings are 85.52 (18) and 81.77 (15)° for the two diphenyl-phosphanyl groups, respectively. In the crystal, mol-ecules are linked into dimers by inter-molecular C-H⋯O hydrogen bonds. Weak inter-molecular C-H⋯π and π-π [centroid-centroid distance = 3.6981 (18) Å] inter-actions stabilize the crystal structure.

Undeca-carbonyl-1κC,2κC,3κC-(triethyl phosphite-1κP)-triangulo-triruthenium(0).

In the title triangulo-triruthenium compound, [Ru(3)(C(6)H(15)O(3)P)(CO)(11)], each Ru atom has distorted octa-hedral coord-ination geometry. The monodentate phosphine ligand is equatorially coordinated to one Ru atom, leaving one equatorial and two axial carbonyl substituents on the Ru atom. Each of the remaining two Ru atoms carries two equatorial and two axial carbonyl groups. In the crystal, mol-ecules are linked into an inversion dimer by a pair of inter-molecular C-H⋯O hydrogen bonds and the dimers are stacked along the b axis.

(E)-3-(4-Chloro-phen-yl)-1-(2,3,4-trichloro-phen-yl)prop-2-en-1-one.

In the title chalcone derivative, C(15)H(8)Cl(4)O, the C=C double bond exists in an E configuration and the dihedral angle between the two benzene rings is 48.13 (11)°. In the crystal, mol-ecules are arranged into columns and stacked down the a axis featuring possible weak aromatic π-π stacking inter-actions [centroid-centroid separation = 3.888 (2) Å].

2-Isobutyl-6-(4-meth-oxy-phen-yl)imidazo[2,1-b][1,3,4]thia-diazole.

In the title compound, C(15)H(17)N(3)OS, the dihedral angle between the statistically planar imidazo[2,1-b][1,3,4]thia-dia-zole fused-ring system (r.m.s. deviation = 0.002 Å) and the methyoxbenzene ring is 4.52 (6)°. In the crystal, mol-ecules are arranged into columns and stacked down the a axis. The crystal structure is stabilized by weak C-H⋯π and π-π inter-actions [centroid-centroid separations = 3.6053 (8) and 3.7088 (7) Å].

Tris(biphenyl-4-yl)arsane.

The asymmetric unit of title compound, C(36)H(27)As, contains two crystallographically independent mol-ecules, A and B, with similar conformations. The two phenyl rings of each biphenyl unit are twisted slightly away from each other with dihedral angles of 6.0 (2), 27.7 (3) and 33.4 (2)° in mol-ecule A and 5.7 (3), 27.5 (2) and 33.0 (2)° in mol-ecule B. The As-bonded phenyl rings make dihedral angles of 54.9 (2), 76.0 (2) and 88.2 (2),° with each other in mol-ecule A, and 60.3 (2), 78.1 (2) and 79.5 (2)° in mol-ecule B. In the crystal, the mol-ecules are stacked down the b axis. Weak inter-molecular C-H⋯π inter-actions stabilize the crystal structure. The crystal studied was a racemic twin, the refined ratio of twin components being 0.461 (7):0.539 (7).

9-(3,4-Dimeth-oxy-phen-yl)-3,4,5,6,7,9-hexa-hydroxanthene-1,8(2H)-dione.

In the title compound, C(21)H(22)O(5), the mean planes of the pyran and dimeth-oxy-phenyl rings are nearly perpendicular to one another, with the dihedral angle between them being 88.21 (8)°. The pyran ring adopts a boat conformation whereas the two fused cyclo-hexane rings adopt envelope conformations. In the crystal, mol-ecules are linked into a three-dimensional network by inter-molecular C-H⋯O hydrogen bonds.

[µ-1,6-Bis(diphenyl-arsan-yl)hexa-ne]bis-[chloridogold(I)].

In the title compound, [Au(2)Cl(2)(C(30)H(32)As(2))], each Au atom is coordinated by As and Cl atoms in an approximately linear geometry. In the crystal, mol-ecules are linked into two-dimensional networks parallel to the ac plane via inter-molecular C-H⋯Cl inter-actions. One of the phenyl rings is disordered over two positions, with site occupancies of 0.518 (8) and 0.482 (8).

[µ-Bis(diphenyl-arsanyl)methane-1:2κAs:As']nona-carbonyl-1κC,2κC,3κC-(triisoprop-yl phos-phite-3κP)-triangulo-triruthenium(0).

The asymmetric unit of the title triangulo-triruthenium compound, Ru(3)(CO)(9)(µ-Ph(2)AsCH(2)AsPh(2))(P[OCH(CH(3))(2)](3)) or [Ru(3)(C(25)H(22)As(2))(C(9)H(21)O(3)P)(CO)(9)], contains two mol-ecules of the triangulo-triruthenium complex. The bis-(diphenyl-arsanyl)methane ligand bridges an Ru-Ru bond and the monodentate phosphite ligand binds to the third Ru atom. Both the arsine and phosphite ligands are equatorial with respect to the Ru(3) triangle. Additionally, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. The dihedral angles between the pairs of benzene rings bound to individual As atoms are 85.67 (8) and 75.91 (8) in the first independent mol-ecule and 74.64 (8) and 70.76 (9) in the second. In the crystal, mol-ecules are linked into a three-dimensional framework by inter-molecular C-H⋯O hydrogen bonds.

Octa-butylbis[µ(2)-4-(diethyl-amino)-benzoato-κO:O']bis-[4-(diethyl-amino)-benzoato-κO]di-µ(3)-oxido-tetra-tin(IV).

The asymmetric unit of the title complex, [Sn(4)(C(4)H(9))(8)(C(11)H(14)NO(2))(4)O(2)], consists of two crystallographically independent half-mol-ecules. The other halves are generated by crystallographic inversion centers. In each tetra-nuclear mol-ecule, both of the two independent Sn atoms are five-coordinated, with distorted trigonal-bipyramidal SnC(2)O(3) geometries. One Sn atom is coordinated by two butyl groups, one O atom of the benzoate anion and two bridging O atoms, whereas the other Sn atom is coordinated by two butyl groups, two O atoms of the benzoate anions and a bridging O atom. All the butyl groups are equatorial with respect to the SnO(3) trigonal plane. Weak intra-molecular C-H⋯O hydrogen bonds stabilize the mol-ecular structures. In one mol-ecule, two of the butyl groups and the bridging benzoate anion are each disordered over two positions.

Bis(µ(2)-2-amino-5-nitro-benzoato)bis-(2-amino-5-nitro-benzoato)octa-butyldi-µ(3)-oxido-tetra-tin(IV).

In the title complex, [Sn(4)(C(4)H(9))(8)(C(7)H(5)N(2)O(4))(4)O(2)], all four Sn(IV) atoms are five-coordinated with distorted trigonal-bipyramidal SnC(2)O(3) geometries. Two Sn(IV) atoms are coordin-ated by two butyl groups, one benzoate O atom and two bridging O atoms, whereas the other two Sn(IV) atoms are coordinated by two butyl groups, two benzoate O atoms and a bridging O atom. All the butyl groups are equatorial with respect to the SnO(3) trigonal plane. In the crystal, mol-ecules are linked into a two-dimensional layer parallel to the ab plane by inter-molecular N-H⋯O and C-H⋯O hydrogen bonds and further stabilized by a π-π inter-action [centroid-centroid distance = 3.6489 (11) Å]. Intra-molecular N-H⋯O and C-H⋯O hydrogen bonds stabilize the mol-ecular structure. Two of the butyl groups are each disordered over two sets of sites with site-occupancy ratios of 0.510 (4):0.490 (4) and 0.860 (5):0.140 (5).

(5E)-5-(4-Meth-oxy-benzyl-idene)-2-(piperidin-1-yl)-1,3-thia-zol-4(5H)-one.

In the title compound, C(16)H(18)N(2)O(2)S, the piperidine ring adopts a chair conformation. The central 4-thia-zolidinone ring makes dihedral angles of 12.01 (7) and 51.42 (9)°, respectively, with the benzene ring and the least-squares plane of the piperidine ring. An intra-molecular C-H⋯S hydrogen bond stabilizes the mol-ecular structure and generates an S(6) ring motif. In the crystal, mol-ecules are linked into a tape along the c axis by inter-molecular C-H⋯O hydrogen bonds.