英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:


请选择你想看的字典辞典:
单词字典翻译
twintig查看 twintig 在百度字典中的解释百度英翻中〔查看〕
twintig查看 twintig 在Google字典中的解释Google英翻中〔查看〕
twintig查看 twintig 在Yahoo字典中的解释Yahoo英翻中〔查看〕





安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Is water an electrophile? - Vedantu
    Water is termed as an electrophile or we can say Lewis acid and an acid is that substance which contain H + H + ion and in water each hydrogen atom has a H + ion So it behaves as an electrophile as water molecules can release a proton and form a bond with the nucleophile
  • What Is Electrophile? - BYJUS
    Important information about electrophiles: Hydronium ion carries a positive charge, but due to the presence of full vacant orbitals in its outer shell, it does not qualify to be an electrophile
  • Nucleophiles and Electrophiles - Master Organic Chemistry
    Yes, there are Many molecules can be both nucleophiles and electrophiles How they behave, determines whether they are electrophile or neutrophile Ex : Water H2O If water is reacted with an electrophile, the water will behave as a nucleophile If water is reacted with an neutrophile, the water will behave as a electrophile
  • Which of the following is an electrophile? - Tardigrade
    AlC l3 is a electrophile because in the AlC l3 molecule the central atom is present with incomplete octet It is electron deficient While H 2O,N H 3 and C 2H 5N H 2 are nucleophile because in these molecules one of the atom has got at least one lone pair of electrons AMU 2002: Which of the following is an electrophile?
  • 7. 1 Nucleophiles and Electrophiles - Chemistry LibreTexts
    This is an idea that makes intuitive sense: a hydroxide ion is much more nucleophilic (and basic) than a water molecule, because the negatively charged oxygen on the hydroxide ion carries greater electron density than the oxygen atom of a neutral water molecule
  • Why H3O+, NH4+, Na+, and Ca2+ are not electrophiles?
    For example, Na +, Ca 2+, H 3 O +, and NH 4 + are not electrophiles Na + and Ca 2+ Sodium (Na) and Calcium (Ca) has 11 and 20 electrons in an atom, and they prefer to lose one and two electrons to reach a stable inert gas configuration
  • Why can water act as a nucleophile and an electrophile?
    Water is an electrophile It acts as electrophile as each hydrogen atom has a positive ( +) charge Further, it behaves as an electrophile as water molecule can release a proton and form a bond with a nucleophile
  • Which of the following is an electrophile O H2O O NH3 O (CH3)2O O SO3
    H₂O (Water): Water has lone pairs of electrons on the oxygen atom, making it a nucleophile (electron-rich species), not an electrophile NH₃ (Ammonia): Similar to water, ammonia possesses a lone pair of electrons on the nitrogen atom, classifying it as a nucleophile
  • Electrophiles and Nucleophiles - Characteristics, Types and Example.
    Examples: Common nucleophiles include OH− (hydroxide ion), NH3 (ammonia), CN− (cyanide ion), H2O (water), and RO− (alkoxide ions) Reactivity of Nucleophiles: Nucleophiles donate their electron pair to electrophiles, leading to the formation of new bonds They are crucial in reactions such as nucleophilic substitution and nucleophilic addition
  • Which of the following is an electrophile? - Vedantu
    Electrophile may be either positively charged or electrically neutral chemical species Electrophile has a strong tendency to attract electrons and hence behave as Lewis acid E g $S{O_3},B{F_3},AlC{l_3}$ etc





中文字典-英文字典  2005-2009