Vinylidene: a very shallow minimum on the C2H2 potential energy surface

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Vinylidene: A Very Shallow Minimum on the C2H2 Potential Energy Surface. Static and Dynamical Considerations

The potential energy surface for the singlet vinylidene -+ acetylene rearrangement has been investigated by using nonempirical molecular electronic structure theory. A doubler plus polarization basis set was used in conjunction with configuration interaction (CI) including single and double excitations, a total of 13 861 configurations.5 Newly developed analytic CI gradient techniques were used...

متن کامل

Ab Initio Intermolecular Potential Energy Surface of CO2-C2H2 Complex.

A new four-dimensional potential energy surface for CO2-C2H2 complex has been calculated by the ab initio methods at MP2/cc-pVXZ and MP2/aug-cc-pVXZ theory. For calculating the PES of the CO2-C2H2 complex, we have chosen to follow the supermolecule approach. The complete basis set limit of potential energy surface has been taken by extrapolation. Our MP2 results showed the most stable form of C...

متن کامل

Tracing the minimum-energy path on the free-energy surface.

The free-energy profile of a reaction can be estimated in a molecular-dynamics approach by imposing a mechanical constraint along a reaction coordinate (RC). Many recent studies have shown that the temperature can greatly influence the path followed by the reactants. Here, we propose a practical way to construct the minimum-energy path directly on the free-energy surface at a given temperature....

متن کامل

Equivalence of vinylidene and excited acetylene (C2H2*): calculated rate constant for vinylidene abstraction from methane

mole of detergent corresponds to an increase of 11.5% in the intermicelle distances and this is evidently significant enough to reduce the intermicelle forces responsible for transmitting the helical order to the macroscopic scale. At this present time the definitive experiments on the precise shape of the micelle in the cholesteric systems has not been made, but also the complex forces between...

متن کامل

Influence of proton transfer degree on the potential energy surface for two very short hydrogen bonds.

The influence of temperature on the proton location in hydrogen bonds has been systematically studied by neutron diffraction in only a few crystal structures. Two of these are the 1:1 complex of urea - phosphoric acid with an OHO hydrogen bond and 4-methylpyridine -pentachlorophenol with an OHN hydrogen bond. Based on these earlier determined crystal structures the potential energy surface (PES...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Journal of the American Chemical Society

سال: 1981

ISSN: 0002-7863,1520-5126

DOI: 10.1021/ja00398a005