Solvothermal Syntheses and Crystal Structures of Two New Nonmetal Borates:C_4H_(10)N_2·B_6O_8(OH)_2

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Two new borate compounds,C4H10N2·B6O8(OH)2 1 and (NH3CH2CH2NH3)B5O8-(OH) 2,have been solvothermally synthesized and structurally characterized by single-crystal X-ray diffraction,IR,elemental analysis and thermal analysis. Compound 1 crystallizes in the monoclinic system,space group P21/c,with a=8.3318(17),b=6.2118(12),c=12.479(3) ,β=108.96(3)o,V=610.8(2) 3,Mr=313.02,Z=2,Dc=1.702 g/cm3,μ=0.150 mm-1,F(000)=320,R =0.0387 and wR =0.0924. Its layered structure is linked by infinite covalently coordinated neutral sheets with 3,20-membered window system,which are built up from alternative B6O8(OH)2 subunits donated by two piperzazine nitrogen donors. 2 crystallizes in monoclinic,space group Cc,with a=6.7207(13),b=11.481(2),c=12.564(3) ,β=95.25(3)o,V=965.4(3) 3,Mr=261.18,Z=4,Dc=1.797 g/cm3,μ= 0.164 mm-1,F(000)=536,R=0.0396 and wR=0.0752. Its oxoborate structure is generated from the sheets of 3,9-membered boron rings bonded diamine molecules through electrostatic and H-bonding interactions to form a two-dimensional layered network. Two new borate compounds, C4H10N2 · B6O8 (OH) 2 1 and (NH3CH2CH2NH3) B5O8- (OH) 2, have been solvothermally synthesized synthetically and structurally characterized by single-crystal X-ray diffraction, IR, elemental analysis and thermal analysis. crystallizes in the monoclinic system space group P21 / c with a = 8.3318 (17), b = 6.2118 (12), c = 12.479 (3) β, β = 108.96 (3) o, V = 610.8 3, Mr = 313.02, Z = 2, Dc = 1.702 g / cm3, μ = 0.150 mm-1, F000 = 320, R = 0.0387 and wR = 0.0924. with a = 6.7207 (13), b = 11.481 (2), with a 3,20-membered window system which is built from alternative B6O8 (OH) 2 subunits donated by two piperzazine nitrogen donors. , c = 12.564 (3) β, β = 95.25 (3) o, V = 965.4 (3) 3, Mr = 261.18, Z = 4, Dc = 1.797 g / cm3, μ = 0.164 mm-1, (000) = 536, R = 0.0396 and wR = 0.0752. Its oxoborate structure is generated from the sheets of 3,9-membered boron rings bonded diamine molecules through electrostatic and H-bondin g interactions to form a two-dimensional layered network.
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