I plan to update it to a newer version soon and that update should bring in a bunch of new word senses for many words (or more accurately, lemma). Tetrahedral (b) SOCl2 (Sulfur is the central atom.) A. Octahedral Describe the molecular shape of the following: (a) NCl2+ A. Special thanks to the contributors of the open-source code that was used in this project: the UBY project (mentioned above), and express.js.Ĭurrently, this is based on a version of wiktionary which is a few years old. Determine the molecular geometry of B r F 5 A. I simply extracted the Wiktionary entries and threw them into this interface! So it took a little more work than expected, but I'm happy I kept at it after the first couple of blunders. Seesaw or disphenoidal is a type of molecular geometry where there are four bonds to a central atom with overall C2v symmetry. Valence shell electron pair repulsion ( VSEPR) theory ( / vspr, vspr / VESP-r, 1 : 410 v-SEP-r 2 ), is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms. The researchers have parsed the whole of Wiktionary and other sources, and compiled everything into a single unified resource. That's when I stumbled across the UBY project - an amazing project which needs more recognition. ![]() However, after a day's work wrangling it into a database I realised that there were far too many errors (especially with the part-of-speech tagging) for it to be viable for Word Type.įinally, I went back to Wiktionary - which I already knew about, but had been avoiding because it's not properly structured for parsing. This caused me to investigate the 1913 edition of Websters Dictionary - which is now in the public domain. I initially started with WordNet, but then realised that it was missing many types of words/lemma (determiners, pronouns, abbreviations, and many more). The seesaw molecular geometry type can be found in the sulfur tetrafluoride (SF 4) with a central sulfur atom that is surrounded by four fluorine atoms occupying two equatorial and two axial positions and one lone equatorial pair as well, corresponding to an AX 4 E molecule. The dictionary is based on the amazing Wiktionary project by wikimedia. Hence, the molecular geometry is different only for the nuclei. The shape of a molecule is determined by the location of the nuclei and its electrons. Using the VSEPR theory, the electron bond pairs and lone pairs on the center atom will help us predict the shape of a molecule. And since I already had a lot of the infrastructure in place from the other two sites, I figured it wouldn't be too much more work to get this up and running. An electron group can be an electron pair, a lone pair, a single unpaired electron, a double bond or a triple bond on the center atom. I had an idea for a website that simply explains the word types of the words that you search for - just like a dictionary, but focussed on the part of speech of the words. ![]() Both of those projects are based around words, but have much grander goals. The valence shell electron pair repulsion (VSEPR) model focuses on the bonding and nonbonding electron pairs present in the outermost (valence) shell of an atom that connects with two or more other atoms.įundamentally, the VSEPR model theorizes that these regions of negative electric charge will repel each other, causing them (and the chemical bonds that they form) to stay as far apart as possible.For those interested in a little info about this site: it's a side project that I developed while working on Describing Words and Related Words. VSEPR Theory: a chemistry model used to predict the shape of individual molecules based on electron-pair electrostatic repulsion.The main geometries without lone pair electrons are: linear, trigonal, tetrahedral, trigonal bipyramidal, and octahedral. Disphenoidal or seesaw (also known as sawhorse) is a type of molecular geometry where there are four bonds to a central atom with overall C2v molecular symmetry.Molecular geometries take into account the number of atoms and the number of lone pair electrons. 10 Q What is the molecular shape of IF5 a) square pyramidal b) tetrahedral c) seesaw d) trigonal bipyramidal e) octahedral. ![]() Fundamentally, the VSEPR model theorizes that regions of negative electric charge will repel each other, causing them (and the chemical bonds that they form) to stay as far apart as possible.
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