1 mgoba 1 a solid mixture of 4 4 u2032 oxybis benzoic acid h 2 oba 50 0 mg and magnesium nitrate hexahydrate mg no 3 2 6h2o 10 0 mg was dissolved in n n dimthylformamide 5 ml in a 20 ml vial 20 u03bcl diisopropylamine and 2 ml n n dimthylformamide was mixed in a 4 ml vial the 4 ml vial was placed in the 20 ml vial to allow diffusion the 20 ml vial was capped and placed in an isothermal oven at 65 u00b0 c for 10 days fig5 shows a framework of mgoba 1 mgbtc 1 a solid mixture of trimesic acid h3btc 50 0 mg and magnesium nitrate hexahydrate mg no 3 2 6h 2 o 150 0 mg was dissolved in a mixture of n n diethylformamide 5 ml ethanol 3 ml and 2 ethyl 1 hexanol 2 ml in a 20 ml vial the vial was capped and placed in an isothermal oven at 85 u00b0 c for 3 days fig6 shows a framework of mgbtc 1 mgbtb 1 a solid mixture of 1 3 5 tri 4 u2032 carboxy 4 4 u2032 biphenyl benzene h3btb 43 5 mg and magnesium acetate tetrahydrate mg oac 2 4h 2 o 5 0 mg was dissolved in a mixture of n n dimethylacetatmide 3 ml and dimethylamine 20 u03bcl in a 4 ml vial the vial was capped and placed in an isothermal oven at 120 u00b0 c for 3.