نتایج جستجو برای: 4 diamino 7 methylbenzogpteridine 5

تعداد نتایج: 2360425  

Journal: :Acta Crystallographica Section E Structure Reports Online 2008

2009
Ying Fan Wei You Hui-Fen Qian Jian-Lan Liu Wei Huang

In the title salt, C(4)H(8)N(5) (+)·NO(3) (-), a ring N atom of 2,6-diamino-4-methyl-triazine is protonated. Each anion is connected to three neighbouring cations by multiple N-H⋯O hydrogen bonds which, together with N-H⋯N contacts, generate a layer structure.

Journal: :Chemical communications 2011
Yumi Hayashi Yasutomo Segawa Makoto Yamashita Kyoko Nozaki

The present communication reports the chemistry of three linear triborane(5) compounds possessing bulky diamino substituents on the terminal boron atoms. Fluorotriborane 2 was synthesized by a reaction of boryllithium and BF(3)·OEt(2). Halogen exchange reaction of 2 took place by a treatment with ClSiMe(3) to give the corresponding chlorotriborane(5) 3. Addition of silver tetraarylborate to 3 i...

2009
Kasthuri Balasubramani Hoong-Kun Fun

In the title compound, C(5)H(8)N(3) (+)·C(7)H(5)O(2) (-), the pyridine N atom is protonated. The carboxyl-ate group of the benzoate anion is twisted away from the attached ring by 10.91 (9)°. In the crystal structure, N-H⋯O hydrogen bonds between 2,3-diamino-pyridinium cations and benzoate anions, and π-π inter-actions between the pyridinium rings [centroid-centroid distance = 3.6467 (9) Å] for...

هدف:  مهارت تعریف واژه یکی از مهارت های پیچیده زبان است که دانش زبانی و فرازبانی نقش موثری در آن دارند. آسیب شنوایی در کودکان، موجب تاخیر در فراگیری زبان درکی و بیانی می ‌شود. این پژوهش با هدف بررسی و مقایسه رشد جنبه محتوایی تعریف واژه در کودکان کم شنوا و طبیعی در سنین5/7-5/4 ساله انجام شد. روش بررسی:  این پژوهش از نوع توصیفی – تحلیلی به روش مقطعی مقایسه ای بود و جامعه ی آماری...

2011
Michael Zachariah

Recently there has been increased interest in high nitrogen content “green” energetic materials which are designed to produce relatively non-toxic decomposition products as part of a push to decrease the environmental impact of energetic materials through all phases of their existence. With the use of a T-Jump/Time-of-Flight Mass Spectrometer (T-Jump/TOFMS) capable of high heating rates (up to ...

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