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| TRANS-CYCLOBUTANE-1,2-DICARBOXYLIC ACID Basic information |
| TRANS-CYCLOBUTANE-1,2-DICARBOXYLIC ACID Chemical Properties |
| Melting point | 125-131 °C | | Boiling point | 140 °C(Press: 2 Torr) | | density | 1.509±0.06 g/cm3(Predicted) | | refractive index | 1.4556 (589.3 nm 25℃) | | storage temp. | 2-8°C | | pka | pK1:3.79 ;pK2:5.61 (25°C) | | BRN | 3198993 | | InChIKey | SUSAGCZZQKACKE-QWWZWVQMSA-N |
| Hazard Codes | Xi | | Risk Statements | 36/37/38 | | Safety Statements | 26-37/39 | | WGK Germany | 3 | | RTECS | GU1680000 | | HS Code | 2917200090 |
| TRANS-CYCLOBUTANE-1,2-DICARBOXYLIC ACID Usage And Synthesis |
| General Description | The interaction of the carboxyl groups in the fragmentation of the molecular ions of cis-cyclobutane-1,2-dicarboxylic acid helps to distinguish it from trans-cyclobutane-1,2-dicarboxylic acid. | | Purification Methods | Crystallise the acid from *C6H6 or *C6H6/EtOAc. The diphenacyl ester has m 98o (from EtOH) and the p-bromodiphenacyl ester has m 158o (from EtOH). The cis-acid isomerizes to the trans-acid on heating in conc HCl at 190o. [Reed J Chem Soc 685 1951, Fison et al. J Am Chem Soc 51 1536 1929, Fison et al. J Am Chem Soc 56 1774 1934, pK: Bode Chem Ber 67 332 1934, Beilstein 9 IV 2788.] |
| TRANS-CYCLOBUTANE-1,2-DICARBOXYLIC ACID Preparation Products And Raw materials |
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