deliberate
发表于 2025-3-21 18:02:45
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expdient
发表于 2025-3-21 23:41:51
Classification,nctional group has been provided, since restrictions on the universal applicability of any one test may arise through low solubility of the unknown substance in the solvent used in the reaction, or interference by the molecular environment of the functional group, leading to little or no reaction.
贫穷地活
发表于 2025-3-22 00:36:13
Melting Point Tables,the same compound selected alternative values are placed in parentheses. It should be noted that widely different figures have been reported for the melting points of some derivatives, e.g. a number of 2,4-dinitrophenylhydrazones, semicarbazones and aroylbenzoic acids. In some cases the discrepancies are probably due to geometrical isomerism.
ABYSS
发表于 2025-3-22 07:53:23
Preliminary Examination, of the state of a compound may be of real value in its identification, but its colour is much less useful, and should be interpreted with caution. Thus, many compounds that are colourless when pure rapidly become coloured when exposed to moist air; for example simple amines, which go brown.
frozen-shoulder
发表于 2025-3-22 09:41:08
Identification, for the preparations of derivatives are given in the following pages. It is important that a selected derivative shall comply with the following requirements:
interpose
发表于 2025-3-22 15:54:57
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裂隙
发表于 2025-3-22 17:19:36
https://doi.org/10.1007/978-1-349-00621-2Aldehyd; Aldehyde; Amine; Ammonium; Barium; Chlorid; elements; Ether; Ketone; Mangan; melting point; Nickel; Per
HARP
发表于 2025-3-23 00:08:04
B. Haynes B.SC. DIP.ED. F.R.I.C.ir respective topics, lists of the necessary materials, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls.. .Thorough and accessible, .Drug Design and Discovery: Methods and Protocols. serve as a vital laboratory reference for pharmaceut
–LOUS
发表于 2025-3-23 05:18:39
B. Haynes B.SC. DIP.ED. F.R.I.C.ir respective topics, lists of the necessary materials, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls.. .Thorough and accessible, .Drug Design and Discovery: Methods and Protocols. serve as a vital laboratory reference for pharmaceut
Asymptomatic
发表于 2025-3-23 08:47:05
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