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The London and North Eastern Railway Class P1 Mineral 2-8-2 Mikado was a class of two steam locomotives designed by Nigel Gresley. They were two of the most powerful freight locomotives ever designed for a British railway. It was initially intended they be a more powerful 2-10-0 version of the earlier Class O2 2-8-0s.
Structure of 2,3,6,7-Tetrachloronaphthalene. Polychlorinated naphthalene (PCN) are the products obtained upon treatment of naphthalene with chlorine.The generic chemical formula is C 10 H 8−(m+n) Cl (m+n).
1-Chloro-3,3,3-trifluoropropene (HFO-1233zd) is the unsaturated chlorofluorocarbon with the formula HClC=C(H)CF 3. The compound exists as E- ( cis- ) and Z- ( trans- ) isomers. The trans- isomer of this colorless gas is of interest as a more environmentally friendly (lower GWP; global warming potential) refrigerant in air conditioners. [ 1 ]
1,3-Bis(diphenylphosphino)propane (dppp) is an organophosphorus compound with the formula Ph 2 P(CH 2) 3 PPh 2. The compound is a white solid that is soluble in organic solvents. It is slightly air-sensitive, degrading in air to the phosphine oxide. It is classified as a diphosphine ligand in coordination chemistry and homogeneous catalysis.
Pigment violet 23 is an organic compound that is a commercial pigment. It is member of the di oxazine family of heterocyclic compounds , but derived from carbazoles . [ 1 ] It is prepared by condensation of chloranil and 3-amino- N -ethyl carbazole .
1,3-Dimethyl-2-imidazolidinone (DMI) is a cyclic urea used as a high-boiling polar aprotic solvent. [2] This colourless, highly polar solvent has high thermal and chemical stability. Together with homologous solvent DMPU , since the 1970s it serves as an analog of tetramethylurea .
2,2-Dichloro-1,1,1-trifluoroethane or HCFC-123 is considered as an alternative to CFC-11 in low pressure refrigeration and HVAC systems, and should not be used in foam blowing processes or solvent applications.
The synthesis of 6-acetyl-1,2,3,4-tetrahydropyridine, an important bread aroma compound, starting from 2-piperidone was accomplished using t-boc anhydride. [14] See Maillard reaction ). The first step in this reaction sequence is the formation of the carbamate from the reaction of the amide nitrogen with boc anhydride in acetonitrile using DMAP ...