2,4-Bis(2-fluoro­phen­yl)-3-aza­bicyclo­[3.3.1]nonan-9-one

The title compound, C20H19F2NO, exists in a twin-chair conformation with an equatorial orientation of the two 2-fluoro­phenyl groups on both sides of the secondary amine group. The benzene rings are orientated at an angle of 25.68 (4)° with respect to one another and the F atoms point upwards (towards the carbonyl group). The crystal is stabilized by an inter­molecular N—H⋯π inter­action

2,6-Bis(4-meth­oxy­phen­yl)-1,3-dimethyl­piperidin-4-one O-benzyl­oxime

The central ring of the title compound, C28H32N2O3, exists in a chair conformation with an equatorial disposition of all the alkyl and aryl groups on the heterocycle. The para-anisyl groups on both sides of the secondary amino group are oriented at an angle of 54.75 (4)° with respect to each other. The oxime derivative exists as an E isomer with the methyl substitution on one of the active methyl­ene centers of the mol­ecule. The crystal packing features weak C—H⋯O inter­actions

2,6-Bis(4-chloro­phen­yl)-1,3-dimethyl­piperidin-4-one O-benzyl­oxime

The piperidin-4-one ring in the title compound, C26H26Cl2N2O, exists in a chair conformation with equatorial orientations of the methyl and 4-chlorophenyl groups. The C atom bonded to the oxime group is statistically planar (bond-angle sum = 360.0°) although the C—C=N bond angles are very different [117.83 (15) and 127.59 (15)°]. The dihedral angle between the chloro­phenyl rings is 54.75 (4)°. In the crystal, mol­ecules inter­act via van der Waals forces

2,4-Bis(3-methoxy­phen­yl)-3-aza­bicyclo­[3.3.1]nonan-9-one

In the crystal structure, the title compound, C22H25NO3, exists in a twin-chair conformation with equatorial orientations of the meta-methoxy­phenyl groups on both sides of the secondary amino group. The title compound is a positional isomer of 2,4-bis­(2-methoxy­phen­yl)-3-aza­bicyclo­[3.3.1]nonan-9-one and 2,4-bis­(4-methoxy­phen­yl)-3-aza­bicyclo­[3.3.1]nonan-9-one, which both also exhibit twin-chair conformations with equatorial dispositions of the anisyl rings on both sides of the secondary amino group. In the title compound, the meta-methoxy­phenyl rings are orientated at an angle of 25.02 (3)° with respect to each other, whereas in the ortho and para isomers, the anisyl rings are orientated at dihedral angles of 33.86 (3) and 37.43 (4)°, respectively. The crystal packing is dominated by van der Waals inter­actions and by an inter­molecular N—H⋯O hydrogen bond, whereas in the ortho isomer, an inter­molecular N—H⋯π inter­action (H⋯Cg = 2.75 Å) is found

2,4-Bis(4-bromo­phen­yl)-3-aza­bicyclo­[3.3.1]nonan-9-one

The title compound, C20H19Br2NO, shows a chair–chair conformation for the aza­bicycle with an equatorial disposition of the 4-bromo­phenyl groups [dihedral angle between the aromatic rings = 16.48 (3)°]. In the crystal, a short Br⋯Br contact [3.520 (4) Å] occurs and the structure is further stabilized by N—H⋯O hydrogen bonds and C—H⋯O inter­actions

2,4-Bis(4-chloro­phen­yl)-3-aza­bicyclo­[3.3.1]nonan-9-one

In the mol­ecular structure of the title compound, C20H19Cl2NO, the mol­ecule exists in a twin-chair conformation with equatorial dispositions of the 4-chloro­phenyl groups on both sides of the secondary amino group; the dihedral angle between the aromatic ring planes is 31.33 (3)°. The crystal structure is stabilized by N—H⋯O inter­actions, leading to chains of molecules

2,4,6,8-Tetra­kis(4-chloro­phen­yl)-3,7-diaza­bicyclo­[3.3.1]nonan-9-one O-benzyl­oxime acetone monosolvate

In the title compound, C38H31Cl4N3O·C3H6O, the 3,7-diaza-bicycle exists in a chair–boat conformation. The 4-chloro­phenyl groups attached to the chair form are equatorially oriented at an angle of 18.15 (3)° with respect to each other, whereas the 4-chloro­phenyl groups attached to the boat form are oriented at an angle of 32.64 (3)°. In the crystal, mol­ecules are linked by N—H⋯π and C—H⋯O inter­actions

Environmental Hazards And Its Impact On Human Health – A Study

In the name of progress or growth of industries, the business community has encouraged the coming up of the various industries using all sorts of chemicals mainly causing health problems to the human society. If any sensitive person raises any question about the health hazards that the science has brought in, the Government responds by various legislations, rules and regulations, guidelines and claims that these laws and rules would control and protect the health of the people. In this context, it should be emphasised here that every State in India is responsible for assuring and guaranteeing hygienic atmosphere and provide healthy environment for its citizens. Indiscriminate permissions to start polluting industries, not maintaining properly the sewerage system, disposal of solid waste, lack of facilities for storing the rain waters, disposal of waste and effluent, improper maintenance of rural lanes, bye-lanes and thickly populated urban areas are main reasons for creating health problem among the people. To make their living free from health hazards and create a peaceful atmosphere and thereby making our living peaceful and pleasurable and not painful and dreary. The Government must take it as its onerous responsibility by plucking into action rather than suggesting and taking without any practicable applicability. Serious steps should be taken, we cannot depend only on the law and State. People must come forward to help the Government. Let us unite to make our lives safe and peaceful by keeping our streets clean, atmosphere unpolluted so that health hazards can completely be prevented

2,4-Bis(2-eth­oxy­phen­yl)-7-methyl-3-aza­bicyclo­[3.3.1]nonan-9-one

The crystal structure of the title compound, C25H31NO3, exists in a twin-chair conformation with an equatorial orientation of the ortho-eth­oxy­phenyl groups. According to Cremer and Pople [Cremer & Pople (1975 ▶), J. Am. Chem. Soc. 97, 1354–1358], both the piperidone and cyclo­hexa­none rings are significantly puckered with total puckering amplitutdes Q T of 0.5889 (18) and 0.554 (2) Å, respectively. The ortho-eth­oxy­phenyl groups are located on either side of the secondary amino group and make a dihedral angle of 12.41 (4)° with respect to each other. The methyl group on the cyclo­hexa­none part occupies an exocyclic equatorial disposition. The crystal packing is stabilized by weak van der Waals inter­actions

Solutions of System of Fractional Partial Differential Equations

In this paper, system of fractional partial differential equation which has numerous applications in many fields of science is considered. Adomian decomposition method, a novel method is used to solve these type of equations. The solutions are derived in convergent series form which shows the effectiveness of the method for solving wide variety of fractional differential equations