Search results
Results From The WOW.Com Content Network
Framework structure of desolvated HKUST-1. The spheres represent two different types of pores within the framework structure. Blue: metal, red: oxygen, black: carbon. Paddlewheel unit (secondary building unit) of the HKUST-1 structure in the hydrated state. One water molecules is coordinated to each of metal center at the axial position.
[1] [2] [3] An extended structure is a structure whose sub-units occur in a constant ratio and are arranged in a repeating pattern. MOFs are a subclass of coordination networks, which is a coordination compound extending, through repeating coordination entities, in one dimension, but with cross-links between two or more individual chains, loops ...
Carbon (6 C) has 14 known isotopes, from 8 C to 20 C as well as 22 C, of which 12 C and 13 C are stable.The longest-lived radioisotope is 14 C, with a half-life of 5.70(3) × 10 3 years. . This is also the only carbon radioisotope found in nature, as trace quantities are formed cosmogenically by the reactio
The isotope carbon-12 (12 C) forms 98.93% of the carbon on Earth, while carbon-13 (13 C) forms the remaining 1.07%. [69] The concentration of 12 C is further increased in biological materials because biochemical reactions discriminate against 13 C. [ 70 ] In 1961, the International Union of Pure and Applied Chemistry (IUPAC) adopted the isotope ...
1.174 546 744 990 17 × 10 19: C 46 H 94: n-hexatetracontane: 47 58 481 806 621 987 010: 3.659 736 342 498 25 × 10 19: C 47 H 96: n-heptatetracontane: 48 156 192 366 474 590 639: 1.141 606 809 779 03 × 10 20: C 48 H 98: n-octatetracontane: 49 417 612 400 765 382 272: 3.564 926 050 353 17 × 10 20: C 49 H 100: n-nonatetracontane: 50 1 117 743 ...
The structure of carbodicarbenes greatly resembles that of carbodiphosphoranes. [4] Computational data for a N-methyl-substituted carbodicarbene predicted a carbon-carbon bond with a length only marginally longer than a C=C bond in a typical allene at 1.358 Å (compared with 1.308 Å for allene), but with a significantly bent bond angle of 131.8° (compared to 180° for a standard linear ...
Graphane is a two-dimensional polymer of carbon and hydrogen with the formula unit (CH) n where n is large. [1] Partial hydrogenation results in hydrogenated graphene, which was reported by Elias et al. in 2009 by a TEM study to be "direct evidence for a new graphene-based derivative". The authors viewed the panorama as "a whole range of new ...
In organic chemistry, a carbyne is a general term for any compound whose structure consists of an electrically neutral carbon atom connected by a single covalent bond and has three non-bonded electrons. [1] The carbon atom has either one or three unpaired electrons, depending on its excitation state; making it a radical.