Emergence of comparable covalency in isostructural cerium(iv)– and uranium(iv)–carbon multiple bonds
نویسندگان
چکیده
منابع مشابه
Covalency of hydrogen bonds in solids revisited.
The covalent nature of short hydrogen bonds has been under debate for long. Here we show that the crystal orbital Hamilton population (COHP) bonding indicator gives new, complementary evidence of covalent hydrogen···acceptor interactions in the molecular solid state.
متن کاملa corpus-based study of the frequency of personal pronouns in translated and comparable non-translated persian texts
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هدف این رساله تحقیق در مورد یافتن ارتباط بین واحدهای درک مطلب (از قبیل پروسه واژگانی، پروسه ساختاری و پروسه تفسیر معنایی) از طریق تست کلوز چهار چوابی در بین دانشجویان سال آخر رشته زبان انگلیسی میباشد. در مرحله اول از 150 دانشجو (80 مونث و 70 مذکر) از بین دانشجویان کارشناسی و کارشناسی ارشد دانشگاههای علامه طباطبائی، دانشگاه شهید بهشتی و دانشگاه آزاد اسلامی واحد شمال تست نلسون (450 دی) گرفته شد. ...
15 صفحه اولTelomere structure and stability: covalency in hydrogen bonds, not resonance assistance, causes cooperativity in guanine quartets.
We show that the cooperative reinforcement between hydrogen bonds in guanine quartets is not caused by resonance-assisted hydrogen bonding (RAHB). This follows from extensive computational analyses of guanine quartets (G(4)) and xanthine quartets (X(4)) based on dispersion-corrected density functional theory (DFT-D). Our investigations cover the situation of quartets in the gas phase, in aqueou...
متن کاملCovalency of hydrogen bonds in liquid water can be probed by proton nuclear magnetic resonance experiments
The concept of covalency is widely used to describe the nature of intermolecular bonds, to explain their spectroscopic features and to rationalize their chemical behaviour. Unfortunately, the degree of covalency of an intermolecular bond cannot be directly measured in an experiment. Here we established a simple quantitative relationship between the calculated covalency of hydrogen bonds in liqu...
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ژورنال
عنوان ژورنال: Chemical Science
سال: 2016
ISSN: 2041-6520,2041-6539
DOI: 10.1039/c6sc00278a