Syntheses, Crystal Structures and Characterization of Two New Cadmium(II) Arsonates

Two cadmium arsonate coordination polymers, Cd（HL1）2 （1, H2L1 = 4-aminophenylarsonatic acid） and Cd（H2L2）2·2H2O （2, H3L2 = 2-（4-arsonphenylamino）acetic acid）, have been synthesized and characterized by IR and single-crystal X-ray diffraction. Crystal data for 1： triclinic, space group P1 with a = 5.7559（12）, b = 7.0903（14）, c = 8.9925（18）, α = 89.04（3）, β = 80.79（3）, γ = 85.09（3）o, Dc = 2.496 g·cm-3, μ = 6.095 mm-1, F（000） = 260, Z = 1, the final R = 0.0574 and wR = 0.1376 for 1489 observed reflections with I 〉 2σ（I）. And those for 2： monoclinic, space group P21/c with a = 4.7595（10）, b = 9.925（2）, c = 22.609（5）, β = 91.81（3）°, Dc = 2.167 g·cm-3, μ = 4.168 mm-1, F（000） = 684, Z = 2, the final R = 0.0335 and wR = 0.0815 for 2340 observed reflections with I 〉 2σ（I）. The structure of 1 shows a two-dimensional layer consisting of inorganic chains of {CdN2（AsO3）2} along the a axis linking with the phenyl groups. These layers are further linked through strong interlayer hydrogen bonding interaction to form a three-dimensional hydrogen bond supramolecular architecture. Compound 2 has inorganic chains of {CdO2（AsO3）2} similar to 1, which connect with four adjacent inorganic chains forming a three-dimensional framework.

Syntheses, Crystal Structures and Characterization of Layered and Layer-pillared Zinc Arsonates

Two zinc arsonate coordination polymers, Zn（4-apa）·H2O （1, 4-apaH2 = 4-amino- phenylarsonatic acid） and Zn（4-apa） （2）, have been hydrothermally synthesized and characterized by elemental analysis, IR and single-crystal and powder X-ray diffraction. Crystal data for 1： monoclinic, space group C2/c with a = 23.056（5）, b = 5.4224（11）, c = 15.027（3） , β = 121.22（3）°, V = 1606.6（6） ？3, Dc = 2.468 g·cm-3, F（000） = 1168, μ = 7.122 mm-1, Z = 8, the final R = 0.0309 and wR = 0.0752 for 1763 observed reflections with I 〉 2σ（I）. For 2： monoclinic, space group P21/c with a = 8.7852（18）, b = 9.2744（19）, c = 9.752（2） , β = 103.45（3）°, V = 772.7（3）3, Dc = 2.410 g·cm-3, F（000） = 544, μ = 7.387 mm-1, Z = 4, the final R = 0.0321 and wR = 0.0741 for 1696 observed reflections with I 〉 2σ（I）. The structure of 1 shows a two-dimensional （4,4）-network composed of an inorganic ladder chain bridged by the phenyl-linkers of 4-apa ligands. Compound 2 exhibits a 3D layer-pillared framework with crb net, in which inorganic （4-82）-networks are joined by the phenyl-linkers.

SYNERGISM OF WOLFRAMITE FLOTATION WITH BENZYL ARSONIC ACID AND SODIUM BUTYL XANTHATE

Wolframite notation with benzyl arsonic acid and sodium butyl xanthate is studied,at first.It shows the efficiency of mineral processig is good when the two agents are added together.Then the synergism of sodium butyl xanthate and benzyl arsonic acid is studied also by HPLC.

A Simple Act of Love

When I was growing up,my father always stoppedwhat he was doing and listened when I’d breathlessly fillhim on my day.For him,no subject was off-limits.When I was lanky and awkward,13,Dad