The two aromatic parts of the title compound, C(16)H(13)ClN(3)O(4), are connected through a conjugated -CH=N-NH-C(O)- fragment, giving an almost planar mol-ecule (r.m.s. deviation 0.08 Å). In the crystal structure, adjacent mol-ecules are linked by N-H⋯O and O-H⋯O hydrogen bonds into a three-dimensional network.
The N'-(1-methyl-1H-indol-3-ylmethyl-idene)hydrazine-carbo-dithio-ate portion of the title mol-ecule, C(18)H(17)N(3)S(2), is nearly planar; this unit and the phenyl ring subtend an angle of 112.9 (2)° at the methyl-ene C atom.
The two aromatic parts of the title compound, C(16)H(13)N(3)O(4)·5H(2)O, are connected through a conjugated -CH=N-NH-C(O)- fragment, giving an almost planar mol-ecule. The organic mol-ecules and uncoordinated water mol-ecules are linked by N-H⋯O and O-H⋯O hydrogen bonds into a three-dimensional network.
In the title salt, [Ag(C(27)H(26)P(2))(2)][Sn(C(6)H(5))(3)(C(2)ClF(2)O(2))], the Ag(I) atom exists in a tetra-hedral coordination geometry formed by four P atoms [Ag-P = 2.460 (1)-2.501 (1) Å], whereas the Sn(IV) atom exists in a trans-trigonal-bipyramidal coordination geometry formed by two O [Sn-O = 2.208 (3) and 2.233 (3) Å] and three C atoms [Sn-C = 2.115 (4)-2.128 (4) Å;(Σ C-Sn-C)= 360.0 (6)°].
The molecule of the title compound, C(18)H(14)N(4), lies on a center of inversion such that there is one half-mol-ecule in the asymmetric unit. The N-N single bond adopts a trans configuration and the indole fused-ring system is nearly coplanar with the -CH=N-N=CH- fragment [dihedral angle = 9.8 (2)°]. Adjacent mol-ecules are linked by indole-azine N-H⋯N hydrogen bonds into a layer motif.
The five-coordinate Sn atom in the title mixed organyl stannate compound, (C(12)H(24)N)[Sn(C(5)H(9))(C(6)H(5))(2)(C(2)ClF(2)O(2))], is in a trans-C(3)SnO(2) trigonal-bipyramidal coordination environment. The NH(2) groups of the cations act as hydrogen-bond donors to two symmetry-related anions, resulting in the formation of linear chains. One of the phenyl rings is disordered over two sites with equal occupancies.
The Sn(IV) atom of the stannate anion in the title salt, (C(7)H(11)N(2))(2)[SnBr(4)(C(6)H(5))(2)], lies on a center of inversion in a tetra-gonally compressed octa-hedron. The two independent Br atoms in the anion are hydrogen-bond acceptors for the same cation.
In the planar title mol-ecule, C(16)H(16)N(2)O(4)·C(2)H(6)O, the planar Schiff base molecule is linked to the ethanol solvent mol-ecule by a hydr-oxy-amide hydrogen bond. The hydr-oxy group of the ethanol mol-ecule is a hydrogen-bond donor to the double-bonded N atom of an adjacent Sciff base, pairs of interactions taking place across a center of symmetry and giving rise to a hydrogen-bonded dimer.
The Ni atom in the centrosymmetric title compound, [Ni(C(10)H(9)N(4)S)(2)], is N,S-chelated by the deprotonated Schiff bases in a square-planar geometry. The -CH=N-N=C(S)-NH(2) frament is planar. Adjacent mol-ecules are linked by hydrogen bonds between the indolyl -NH (donor) site and the double-bond =N- (acceptor) site of an adjacent mol-ecule, forming a layer motif.
In the title salt, [Ag(C(26)H(24)P(2))(2)][Sn(C(2)ClF(2)O(2))(2)(C(6)H(5))(2)(C(6)H(4)Cl)], the Ag(I) atom has a tetra-hedral and the Sn(IV) atom a trans-trigonal-bipyramidal coordination geometry. In the anion, the chloro substituent is disordered over two rings (occupancy ratio 0.81:0.19); the two chloro-difluoro-methyl groups are also disordered over two sites for their halogen atoms (occupancy ratios 0.72:0.28 and 0.70:0.30).
In the title compound, C(17)H(15)N(3)O(2)·C(2)H(6)O, Schiff base molecules are linked by a hydr-oxy-amido hydrogen bond into a helical chain running along the b axis. This chain is consolidated by two other hydrogen bonds; the ethanol solvent mol-ecule is a hydrogen-bond donor to the amide group and a hydrogen-bond acceptor for the indolyl NH group of an adjacent Schiff base mol-ecule.
N-Isobutyl-phthalimic acid hydrolyzes to the title salt, 2C(4)H(12)N(+)·C(8)H(4)O(4) (-)·H(2)O, which adopts a hydrogen-bonded layer structure. In the anion, the carboxyl-ate groups are twisted with respect to the benzene ring [dihedral angles = 43.8 (1) and 50.9 (1)°].
The title mol-ecule, C(11)H(11)NO(3), lies on a crystallographic mirror plane which bis-ects the plane of the phthalimide unit and contains the C and O atoms of the 2-methoxy-ethyl group.
Three transition metal derivatives (Zn, Cu, and Ni) of 2-[2-bromoethyliminomethyl]-4-[ethoxymethyl]phenol (L) were synthesized by the reaction of the metal salts with the Schiff base ligand in one pot. In the crystal structure of [Zn(L)Br], the Schiff base ligand binds to the metal center through its phenolate oxygen and imine nitrogen, and adopts a distorted tetrahedral geometry. These compounds were found to inhibit topoisomerase I (topo I) activity, induce DNA cleavage and show DNA binding activity. Moreover, these compounds were found to be cytotoxic towards several cancer cell lines (A2780, MCF-7, HT29, HepG2, A549, PC3, LNCaP) and prevent metastasis of PC3. Collectively, Cu(II) complex 2 shows superior activity relative to its Zn(II) and Ni(II) analogs.
Novel tricyclic keto diesters have been synthesized by a one-pot three-component procedure via DABCO-catalyzed domino Knoevenagel-Michael addition reactions. Also, an efficient four-component reaction for the synthesis of another new group of tricyclic keto diesters has been developed via domino Knoevenagel-intramolecular oxo-Diels-Alder reactions. A selective thermal isomerization of the synthesized chromenes to fumarates is also described. X-ray analyses confirm unambiguously the structures of the products.
To describe the technique and outcome of a novel dual staged supraglottoplasty for the treatment of neurological induced adult onset laryngomalacia. A 55 year old male had a diagnosed neurodegenerative disorder with suspected Pompe's disease associated with Trap door epiglottis and proximal myopathy.This was complicated with emergency airway distress and subsequent tracheostomy.Trap-door epiglottis (also known as adult-onset laryngomalacia) associated with neurodegenerative disorders constitute a surgical challenge as it is often coupled with failure of tracheostomy decannulation when present. The patient underwent a novel dual staged endoscopic supraglottoplasty whereby an initial stage of epiglottopexy and submucosal diathermy was made at the vallecula.This was then followed by an interval of 6 weeks whereby a partial epiglottotectomy was made at the upper 3rd of the epiglottis and reduction of lingual tonsils was done using radiofrequency ablation.Trachesotomy was decannulated 1 month after the second stage procedure and his airway remains asymptomatic after 1 year of surgical treatment. This case report describes the success of tracheostomy decannulation after a novel dual staged supraglottoplasty for adult onset laryngomalcia (also known as trap-door epiglottis) .
In the centrosymmetric title compound, [Sn(4)Br(2)(C(6)H(5))(8)O(2)(OH)(2)], the four tin(IV) atoms are bridged by the hydroxo and oxo ligands, forming a ladder-like array of three edge-connected Sn(2)O(2) squares. The two independent tin atoms show distorted trigonal-bipyramidal SnC(2)O(3) and SnC(2)O(2)Br coordination geometries.
The two aromatic rings in the title compound, C(10)H(8)ClN(3), open the angle at the planar N atom to 128.00 (12)°. The amino N atom of one mol-ecule forms a hydrogen bond to the 1-N atom of an adjacent pyrimidyl ring, generating a hydrogen-bonded dimer.
The molecule of the title complex, [Ni2(C21H15N3O5)2(H2O)4]·4C3H7NO, is located on an inversion centre. This results in a dimeric Ni(II) complex, with the two Ni(II) atoms bridged by phenolate O atoms. The tridentate ligand is chelated to each Ni(II) atom via one N and two O atoms of the imino-late form of the hydrazide moiety, which has the same conformation as the free ligand. The coordination geometry around each Ni(II) ion is slightly distorted octa-hedral. A supra-molecular three-dimensional architecture is created by dominant inter-molecular O-H⋯N, O-H⋯O and C-H⋯O hydrogen-bonding inter-actions. These are augmented by two C-H⋯π inter-actions and a π-π inter-action with a centroid-centroid distance of 3.681 (2) Å.