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- 2026年04月28日
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- 详细信息
- 文献和实验
- 技术资料
- 保质期：
1-2年
- 英文名：
PEG Derivatives
- 库存：
大量
- 供应商：
JenKem
- CAS号：
无
- 保存条件：
本品应在惰性气体保护下避光密闭冷冻保存， 零下20度
- 规格：
1g,5g,10g等
异官能团双取代聚乙二醇衍生物
异官能团双取代聚乙二醇衍生物是绝佳的连接剂，其片段具有水溶性、生物相溶性、灵活性。
以下是异官能团双取代聚乙二醇衍生物的典型结构式：
X—PEG—Y
图中X与Y表示官能团或活性基团
以下是异官能团双取代聚乙二醇衍生列表：
HO-PEG-COOH: Hydroxyl PEG Carboxyl, MW 1000, MW 2000, MW 3500, MW 5000, MW 7500, MW 10000, MW 20000
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5233-1
|
HO-PEG1000-COOH,1g
|
Hydroxyl PEG Carboxyl, MW 1000
|
电询
|
|
A5233-5
|
HO-PEG1000-COOH,5g
|
Hydroxyl PEG Carboxyl, MW 1000
|
电询
|
|
A5009-1
|
HO-PEG2000-COOH,1g
|
Hydroxyl PEG Carboxyl, MW 2000
|
电询
|
|
A5009-5
|
HO-PEG2000-COOH,5g
|
Hydroxyl PEG Carboxyl, MW 2000
|
电询
|
|
A5010-1
|
HO-PEG3500-COOH,1g
|
Hydroxyl PEG Carboxyl, MW 3500
|
电询
|
|
A5010-5
|
HO-PEG3500-COOH,5g
|
Hydroxyl PEG Carboxyl, MW 3500
|
电询
|
|
A5011-1
|
HO-PEG5000-COOH,1g
|
Hydroxyl PEG Carboxyl, MW 5000
|
电询
|
|
A5011-5
|
HO-PEG5000-COOH,5g
|
Hydroxyl PEG Carboxyl, MW 5000
|
电询
|
|
A5012-1
|
HO-PEG7500-COOH,1g
|
Hydroxyl PEG Carboxyl, MW 7500
|
电询
|
|
A5012-5
|
HO-PEG7500-COOH,5g
|
Hydroxyl PEG Carboxyl, MW 7500
|
电询
|
|
A5155-1
|
HO-PEG10K-COOH,1g
|
Hydroxyl PEG Carboxyl, MW 10000
|
电询
|
|
A5155-5
|
HO-PEG10K-COOH,5g
|
Hydroxyl PEG Carboxyl, MW 10000
|
电询
|
|
A5156-1
|
HO-PEG20K-COOH,1g
|
Hydroxyl PEG Carboxyl, MW 20000
|
电询
|
|
A5156-5
|
HO-PEG20K-COOH,5g
|
Hydroxyl PEG Carboxyl, MW 20000
|
电询
|
HO-PEG-NHS: Hydroxyl PEG NHS Ester, MW 2000, MW 3500, MW 5000, MW 7500
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5076-1
|
HO-PEG2000-NHS,1g
|
Hydroxyl PEG NHS Ester, MW 2000
|
电询
|
|
A5076-5
|
HO-PEG2000-NHS,5g
|
Hydroxyl PEG NHS Ester, MW 2000
|
电询
|
|
A5077-1
|
HO-PEG3500-NHS,1g
|
Hydroxyl PEG NHS Ester, MW 3500
|
电询
|
|
A5077-5
|
HO-PEG3500-NHS,5g
|
Hydroxyl PEG NHS Ester, MW 3500
|
电询
|
|
A5078-1
|
HO-PEG5000-NHS,1g
|
Hydroxyl PEG NHS Ester, MW 5000
|
电询
|
|
A5078-5
|
HO-PEG5000-NHS,5g
|
Hydroxyl PEG NHS Ester, MW 5000
|
电询
|
|
A5079-1
|
HO-PEG7500-NHS,1g
|
Hydroxyl PEG NHS Ester, MW 7500
|
电询
|
|
A5079-5
|
HO-PEG7500-NHS,5g
|
Hydroxyl PEG NHS Ester, MW 7500
|
电询
|
HS-PEG-COOH: Thiol PEG Carboxyl, MW 2000, MW 3500, MW 5000, MW 7500
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5098-1
|
HS-PEG2000-COOH,1g
|
Thiol PEG Carboxyl, MW 2000
|
电询
|
|
A5098-5
|
HS-PEG2000-COOH,5g
|
Thiol PEG Carboxyl, MW 2000
|
电询
|
|
A5099-1
|
HS-PEG3500-COOH,1g
|
Thiol PEG Carboxyl, MW 3500
|
电询
|
|
A5099-5
|
HS-PEG3500-COOH,5g
|
Thiol PEG Carboxyl, MW 3500
|
电询
|
|
A5100-1
|
HS-PEG5000-COOH,1g
|
Thiol PEG Carboxyl, MW 5000
|
电询
|
|
A5100-5
|
HS-PEG5000-COOH,5g
|
Tiol PEhG Carboxyl, MW 5000
|
电询
|
|
A5101-1
|
HS-PEG7500-COOH,1g
|
Thiol PEG Carboxyl, MW 7500
|
电询
|
|
A5101-5
|
HS-PEG7500-COOH,5g
|
Thiol PEG Carboxyl, MW 7500
|
电询
|
HS-PEG-SGA: Thiol PEG Succinimidyl Glutaramide, MW 3500. MW 5000
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5216-1
|
HS-PEG3500-SGA,1g
|
Thiol PEG Succinimidyl Glutaramide, MW 3500
|
电询
|
|
A5216-5
|
HS-PEG3500-SGA,5g
|
Thiol PEG Succinimidyl Glutaramide, MW 3500
|
电询
|
|
A5240-1
|
HS-PEG5000-SGA,1g
|
Thiol PEG Succinimidyl Glutaramide, MW 5000
|
电询
|
|
A5240-5
|
HS-PEG5000-SGA,5g
|
Thiol PEG Succinimidyl Glutaramide, MW 3500
|
电询
|
HO-PEG-NH2: Hydroxyl PEG Amine, HCl Salt, MW 1000, MW 2000, MW 3500, MW 5000, MW 7500, MW 10000, MW 20000
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5234-1
|
HO-PEG1000-NH2,1g
|
Hydroxyl PEG Amine, HCl Salt, MW 1000
|
电询
|
|
A5234-5
|
HO-PEG1000-NH2,5g
|
Hydroxyl PEG Amine, HCl Salt, MW 1000
|
电询
|
|
A5013-1
|
HO-PEG2000-NH2,1g
|
Hydroxyl PEG Amine, HCl Salt, MW 2000
|
电询
|
|
A5013-5
|
HO-PEG2000-NH2,5g
|
Hydroxyl PEG Amine, HCl Salt, MW 2000
|
电询
|
|
A5014-1
|
HO-PEG3500-NH2,1g
|
Hydroxyl PEG Amine, HCl Salt, MW 3500
|
电询
|
|
A5014-5
|
HO-PEG3500-NH2,5g
|
Hydroxyl PEG Amine, HCl Salt, MW 3500
|
电询
|
|
A5015-1
|
HO-PEG5000-NH2,1g
|
Hydroxyl PEG Amine, HCl Salt, MW 5000
|
电询
|
|
A5015-5
|
HO-PEG5000-NH2,5g
|
Hydroxyl PEG Amine, HCl Salt, MW 5000
|
电询
|
|
A5016-1
|
HO-PEG7500-NH2,1g
|
Hydroxyl PEG Amine, HCl Salt, MW 7500
|
电询
|
|
A5016-5
|
HO-PEG7500-NH2,5g
|
Hydroxyl PEG Amine, HCl Salt, MW 7500
|
电询
|
|
A5157-1
|
HO-PEG10K-NH2,1g
|
Hydroxyl PEG Amine, HCl Salt, MW 10000
|
电询
|
|
A5157-5
|
HO-PEG10K-NH2,5g
|
Hydroxyl PEG Amine, HCl Salt, MW 10000
|
电询
|
|
A5158-1
|
HO-PEG20K-NH2,1g
|
Hydroxyl PEG Amine, HCl Salt, MW 20000
|
电询
|
|
A5158-5
|
HO-PEG20K-NH2,5g
|
Hydroxyl PEG Amine, HCl Salt, MW 20000
|
电询
|
HS-PEG-NH2: Thiol PEG Amine, HCl Salt, MW 2000, MW 3500, MW 5000, MW 7500
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5143-1
|
HS-PEG2000-NH2,1g
|
Thiol PEG Amine, HCl Salt, MW 2000
|
电询
|
|
A5143-5
|
HS-PEG2000-NH2,5g
|
Thiol PEG Amine, HCl Salt, MW 2000
|
电询
|
|
A5144-1
|
HS-PEG3500-NH2,1g
|
Thiol PEG Amine, HCl Salt, MW 3500
|
电询
|
|
A5144-5
|
HS-PEG3500-NH2,5g
|
Thiol PEG Amine, HCl Salt, MW 3500
|
电询
|
|
A5145-1
|
HS-PEG5000-NH2,1g
|
Thiol PEG Amine, HCl Salt, MW 5000
|
电询
|
|
A5145-5
|
HS-PEG5000-NH2,5g
|
Thiol PEG Amine, HCl Salt, MW 5000
|
电询
|
|
A5146-1
|
HS-PEG7500-NH2,1g
|
Thiol PEG Amine, HCl Salt, MW 7500
|
电询
|
|
A5146-5
|
HS-PEG7500-NH2,5g
|
Thiol PEG Amine, HCl Salt, MW 7500
|
电询
|
NH2-PEG-COOH: Amine PEG Carboxyl, HCl Salt, MW 1000, MW 2000, MW 3500, MW 5000, MW 7500, MW 10000, MW 20000
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5236-1
|
NH2-PEG1000-COOH,1g
|
Amine PEG Carboxyl, HCl Salt, MW 1000
|
电询
|
|
A5236-5
|
NH2-PEG1000-COOH,5g
|
Amine PEG Carboxyl, HCl Salt, MW 1000
|
电询
|
|
A5017-1
|
NH2-PEG2000-COOH,1g
|
Amine PEG Carboxyl, HCl Salt, MW 2000
|
电询
|
|
A5017-5
|
NH2-PEG2000-COOH,5g
|
Amine PEG Carboxyl, HCl Salt, MW 2000
|
电询
|
|
A5018-1
|
NH2-PEG3500-COOH,1g
|
Amine PEG Carboxyl, HCl Salt, MW 3500
|
电询
|
|
A5018-5
|
NH2-PEG3500-COOH,5g
|
Amine PEG Carboxyl, HCl Salt, MW 3500
|
电询
|
|
A5019-1
|
NH2-PEG5000-COOH,1g
|
Amine PEG Carboxyl, HCl Salt, MW 5000
|
电询
|
|
A5019-5
|
NH2-PEG5000-COOH,5g
|
Amine PEG Carboxyl, HCl Salt, MW 5000
|
电询
|
|
A5020-1
|
NH2-PEG7500-COOH,1g
|
Amine PEG Carboxyl, HCl Salt, MW 7500
|
电询
|
|
A5020-5
|
NH2-PEG7500-COOH,5g
|
Amine PEG Carboxyl, HCl Salt, MW 7500
|
电询
|
|
A5159-1
|
NH2-PEG10K-COOH,1g
|
Amine PEG Carboxyl, HCl Salt, MW 10000
|
电询
|
|
A5159-5
|
NH2-PEG10K-COOH,5g
|
Amine PEG Carboxyl, HCl Salt, MW 10000
|
电询
|
|
A5160-1
|
NH2-PEG20K-COOH,1g
|
Amine PEG Carboxyl, HCl Salt, MW 20000
|
电询
|
|
A5160-5
|
NH2-PEG20K-COOH,5g
|
Amine PEG Carboxyl, HCl Salt, MW 20000
|
电询
|
TBOC-PEG-OH: t-Boc Amine PEG Hydroxyl, MW 2000, MW 3500, MW 5000, MW 7500
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5045-1
|
TBOC-PEG2000-OH,1g
|
t-Boc Amine PEG Hydroxyl, MW 2000
|
电询
|
|
A5045-5
|
TBOC-PEG2000-OH,5g
|
t-Boc Amine PEG Hydroxyl, MW 2000
|
电询
|
|
A5046-1
|
TBOC-PEG3500-OH,1g
|
t-Boc Amine PEG Hydroxyl, MW 3500
|
电询
|
|
A5046-5
|
TBOC-PEG3500-OH,5g
|
t-Boc Amine PEG Hydroxyl, MW 3500
|
电询
|
|
A5047-1
|
TBOC-PEG5000-OH,1g
|
t-Boc Amine PEG Hydroxyl, MW 5000
|
电询
|
|
A5047-5
|
TBOC-PEG5000-OH,5g
|
t-Boc Amine PEG Hydroxyl, MW 5000
|
电询
|
|
A5048-1
|
TBOC-PEG7500-OH,1g
|
t-Boc Amine PEG Hydroxyl, MW 7500
|
电询
|
|
A5048-5
|
TBOC-PEG7500-OH,5g
|
t-Boc Amine PEG Hydroxyl, MW 7500
|
电询
|
FMOC-PEG-OH: Fmoc Amine PEG Hydroxyl, MW 2000, MW 3500, MW 5000, MW 7500
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5131-1
|
FMOC-PEG2000-OH,1g
|
Fmoc Amine PEG Hydroxyl, MW 2000
|
电询
|
|
A5131-5
|
FMOC-PEG2000-OH,5g
|
Fmoc Amine PEG Hydroxyl, MW 2000
|
电询
|
|
A5129-1
|
FMOC-PEG3500-OH,1g
|
Fmoc Amine PEG Hydroxyl, MW 3500
|
电询
|
|
A5129-5
|
FMOC-PEG3500-OH,5g
|
Fmoc Amine PEG Hydroxyl, MW 3500
|
电询
|
|
A5128-1
|
FMOC-PEG5000-OH,1g
|
Fmoc Amine PEG Hydroxyl, MW 5000
|
电询
|
|
A5128-5
|
FMOC-PEG5000-OH,5g
|
Fmoc Amine PEG Hydroxyl, MW 5000
|
电询
|
|
A5130-1
|
FMOC-PEG7500-OH,1g
|
Fmoc Amine PEG Hydroxyl, MW 7500
|
电询
|
|
A5130-5
|
FMOC-PEG7500-OH,5g
|
Fmoc Amine PEG Hydroxyl, MW 7500
|
电询
|
TBOC-PEG-NH2: t-Boc Amine PEG Amine, HCl Salt, MW 2000, MW 3500, MW 5000, MW 7500
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5042-1
|
TBOC-PEG2000-NH2,1g
|
t-Boc Amine PEG Amine, HCl Salt, MW 2000
|
电询
|
|
A5042-5
|
TBOC-PEG2000-NH2,5g
|
t-Boc Amine PEG Amine, HCl Salt, MW 2000
|
电询
|
|
A5043-1
|
TBOC-PEG3500-NH2,1g
|
t-Boc Amine PEG Amine, HCl Salt, MW 3500
|
电询
|
|
A5043-5
|
TBOC-PEG3500-NH2,5g
|
t-Boc Amine PEG Amine, HCl Salt, MW 3500
|
电询
|
|
A5040-1
|
TBOC-PEG5000-NH2,1g
|
t-Boc Amine PEG Amine, HCl Salt, MW 5000
|
电询
|
|
A5040-5
|
TBOC-PEG5000-NH2,5g
|
t-Boc Amine PEG Amine, HCl Salt, MW 5000
|
电询
|
|
A5044-1
|
TBOC-PEG7500-NH2,1g
|
t-Boc Amine PEG Amine, HCl Salt, MW 7500
|
电询
|
|
A5044-5
|
TBOC-PEG7500-NH2,5g
|
t-Boc Amine PEG Amine, HCl Salt, MW 7500
|
电询
|
FMOC-PEG-NH2: Fmoc Amine PEG Amine, TFA Salt, MW 2000, MW 3500, MW 5000, MW 7500
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5138-1
|
FMOC-PEG2000-NH2,1g
|
Fmoc Amine PEG Amine, TFA Salt, MW 2000
|
电询
|
|
A5138-5
|
FMOC-PEG2000-NH2,5g
|
Fmoc Amine PEG Amine, TFA Salt, MW 2000
|
电询
|
|
A5139-1
|
FMOC-PEG3500-NH2,1g
|
Fmoc Amine PEG Amine, TFA Salt, MW 3500
|
电询
|
|
A5139-5
|
FMOC-PEG3500-NH2,5g
|
Fmoc Amine PEG Amine, TFA Salt, MW 3500
|
电询
|
|
A5140-1
|
FMOC-PEG5000-NH2,1g
|
Fmoc Amine PEG Amine, TFA Salt, MW 5000
|
电询
|
|
A5140-5
|
FMOC-PEG5000-NH2,5g
|
Fmoc Amine PEG Amine, TFA Salt, MW 5000
|
电询
|
|
A5141-1
|
FMOC-PEG7500-NH2,1g
|
Fmoc Amine PEG Amine, TFA Salt, MW 7500
|
电询
|
|
A5141-5
|
FMOC-PEG7500-NH2,5g
|
Fmoc Amine PEG Amine, TFA Salt, MW 7500
|
电询
|
TBOC-PEG-COOH: t-Boc Amine PEG Carboxyl, MW 2000, MW 3500, MW 5000, MW 7500
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5071-1
|
TBOC-PEG2000-COOH,1g
|
t-Boc Amine PEG Carboxyl, MW 2000
|
电询
|
|
A5071-5
|
TBOC-PEG2000-COOH,5g
|
t-Boc Amine PEG Carboxyl, MW 2000
|
电询
|
|
A5116-1
|
TBOC-PEG3500-COOH,1g
|
t-Boc Amine PEG Carboxyl, MW 3500
|
电询
|
|
A5116-5
|
TBOC-PEG3500-COOH,5g
|
t-Boc Amine PEG Carboxyl, MW 3500
|
电询
|
|
A5163-1
|
TBOC-PEG5000-COOH,1g
|
t-Boc Amine PEG Carboxyl, MW 5000
|
电询
|
|
A5163-5
|
TBOC-PEG5000-COOH,5g
|
t-Boc Amine PEG Carboxyl, MW 5000
|
电询
|
|
A5064-1
|
TBOC-PEG7500-COOH,1g
|
t-Boc Amine PEG Carboxyl, MW 7500
|
电询
|
|
A5064-5
|
TBOC-PEG7500-COOH,5g
|
t-Boc Amine PEG Carboxyl, MW 7500
|
电询
|
FMOC-PEG-COOH: Fmoc Amine PEG Carboxyl, MW 2000, MW 3500, MW 5000, MW 7500
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5081-1
|
FMOC-PEG2000-COOH,1g
|
Fmoc Amine PEG Carboxyl, MW 2000
|
电询
|
|
A5081-5
|
FMOC-PEG2000-COOH,5g
|
Fmoc Amine PEG Carboxyl, MW 2000
|
电询
|
|
A5135-1
|
FMOC-PEG3500-COOH,1g
|
Fmoc Amine PEG Carboxyl, MW 3500
|
电询
|
|
A5135-5
|
FMOC-PEG3500-COOH,5g
|
Fmoc Amine PEG Carboxyl, MW 3500
|
电询
|
|
A5136-1
|
FMOC-PEG5000-COOH,1g
|
Fmoc Amine PEG Carboxyl, MW 5000
|
电询
|
|
A5136-5
|
FMOC-PEG5000-COOH,5g
|
Fmoc Amine PEG Carboxyl, MW 5000
|
电询
|
|
A5137-1
|
FMOC-PEG7500-COOH,1g
|
Fmoc Amine PEG Carboxyl, MW 7500
|
电询
|
|
A5137-5
|
FMOC-PEG7500-COOH,5g
|
Fmoc Amine PEG Carboxyl, MW 7500
|
电询
|
TBOC-PEG-NHS: t-Boc Amine PEG NHS Ester, MW 2000, MW 3500, MW 5000, MW 7500
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5095-1
|
TBOC-PEG2000-NHS,1g
|
t-Boc Amine PEG NHS Ester, MW 2000
|
电询
|
|
A5095-5
|
TBOC-PEG2000-NHS,5g
|
t-Boc Amine PEG NHS Ester, MW 2000
|
电询
|
|
A5056-1
|
TBOC-PEG3500-NHS,1g
|
t-Boc Amine PEG NHS Ester, MW 3500
|
电询
|
|
A5056-5
|
TBOC-PEG3500-NHS,5g
|
t-Boc Amine PEG NHS Ester, MW 3500
|
电询
|
|
A5096-1
|
TBOC-PEG5000-NHS,1g
|
t-Boc Amine PEG NHS Ester, MW 5000
|
电询
|
|
A5096-5
|
TBOC-PEG5000-NHS,5g
|
t-Boc Amine PEG NHS Ester, MW 5000
|
电询
|
|
A5097-1
|
TBOC-PEG7500-NHS,1g
|
t-Boc Amine PEG NHS Ester, MW 7500
|
电询
|
|
A5097-5
|
TBOC-PEG7500-NHS,5g
|
t-Boc Amine PEG NHS Ester, MW 7500
|
电询
|
FMOC-PEG-NHS: Fmoc Amine PEG NHS Ester, MW 2000, MW 3500, MW 5000, MW 7500
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5049-1
|
FMOC-PEG2000-NHS,1g
|
Fmoc Amine PEG NHS Ester, MW 2000
|
电询
|
|
A5049-5
|
FMOC-PEG2000-NHS,5g
|
Fmoc Amine PEG NHS Ester, MW 2000
|
电询
|
|
A5050-1
|
FMOC-PEG3500-NHS,1g
|
Fmoc Amine PEG NHS Ester, MW 3500
|
电询
|
|
A5050-5
|
FMOC-PEG3500-NHS,5g
|
Fmoc Amine PEG NHS Ester, MW 3500
|
电询
|
|
A5051-1
|
FMOC-PEG5000-NHS,1g
|
Fmoc Amine PEG NHS Ester, MW 5000
|
电询
|
|
A5051-5
|
FMOC-PEG5000-NHS,5g
|
Fmoc Amine PEG NHS Ester, MW 5000
|
电询
|
|
A5052-1
|
FMOC-PEG7500-NHS,1g
|
Fmoc Amine PEG NHS Ester, MW 7500
|
电询
|
|
A5052-5
|
FMOC-PEG7500-NHS,5g
|
Fmoc Amine PEG NHS Ester, MW 7500
|
电询
|
ACLT-PEG-NHS: Acrylate PEG NHS Ester, MW 2000, MW 3500, MW 5000, MW 7500
|
ITEM CODE
|
ITEM NUMBER
|
ITEM DESCRIPTION
|
PRICE (RMB)
|
|
A5021-1
|
ACLT-PEG2000-NHS,1g
|
Acrylate PEG NHS Ester, MW 2000
|
电询
|
|
A5021-5
|
ACLT-PEG2000-NHS,5g
|
Acrylate PEG NHS Ester, MW 2000
|
电询 |
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个甲基连于a键，能量相同，稳定性相同。 反式异构体中，两个甲基位于环的异侧，两个甲基可以都连在两个e键上（ee型），或都连于两个a键上（aa型）。显然ee型比较稳定。所以，反式1，2-二甲基环己烷主要以ee型的构象存在。 当两个取代基不相同时，如顺-1-甲基-4-叔丁基在e键，甲基在a键的构象为优势构象。 所以环己烷和取代环己烷的构象稳定性有如下规律： ①椅型构象比船型构象稳定。 ②
液固吸附色谱仪一般保留规律： 1、氟化物＜氯化物＜溴化物＜碘化物。 2、顺式几何异构体比反式几何异构体保留值大。 3、官能团之间的分子内氢键将使保留值减小。 4、极性基团旁边有庞大烷基存在时，保留值减小。 5、环己烷衍生物和甾体化合物的中位取代基比轴端取代基有更强的保留。
分子中烃基（或氢原子）跟羧基（—COOH）连接的有机化合物，叫做羧酸。根据羧基连接的烃基不同，羧酸分脂肪族羧酸（如CH 3 COOH乙酸）、脂环族羧酸（如环戊基甲酸）和芳香族羧酸（如苯甲酸）。根据分子中所含羧基的数目，分成一元羧酸、二元羧酸等。羧酸的官能团是由羰基和羟基构成的羧基。这两种基团互相影响，使羧酸羟基的酸性比醇羟基的酸性约强10 11 倍。大多数无取代基的羧酸的pKa在3.5～5的范围内，因此它们是弱酸，但比碳酸（pK a ＝6.38）强。羧基中的羟基可被一系
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异官能团双取代聚乙二醇衍生物
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