The Chemputer recognises formulae such as C4H8Br2 containing only the elements. Some fragments or compounds such as methyl are so common and important that they are given their own special symbols. So, methyl is Me. These special groups are pseudo-elements.
This is the current list of pseudo-elements permitted when entering chemical formulae. Note that in every case, the first letter is a capital letter and all the remaining ones are lowercase. In the chemical literature some of these abbreviations, such as COT or THF, are all in capitals, or all all lowercase, such as cot or thf. In the Chemputer you must use Cot and Thf instead.
Acac C5H7O Aq OH2 Bu C4H9 Bz C9H11 Cbd C4H4 Cht C8H10 Cod C8H12 Cot C8H8 Cp (η5-C5H5) Cp' (η5-C5H4Me) Cp* (η5-C5Me5) Cy C6H11 Dec C10H21 Dien NH2CH2CH2NH2 Diphos P(CH2)2PPh2 Dmpe Me2PCH2CH2PMe2 Dmpm Me2PCH2PMe2 Dmso Me2SO Dppe Ph2P(CH2)2PPh2 Dppp Ph2P(CH2)3PPh2 Dppm Ph2PCH2PPh2 En NH2CH2CH2NH2 Et C2H5 Fc (-C5H4)FeCp Fp Fe(CO)2Cp Hpt C7H15 Hx C6H13 Me CH3 Mes C6H2Me3 Mp Mo(CO)2Cp Nap C10H8 Nbd C7H7 Non C9H19 Oct C8H15 Ph C6H5 Pn C5H11 Ppn N(PPh3)2 Pro C3H7 (Pr is the symbol for praseodymium!) Rp Ru(CO)2Cp Tcne C2(CN)4 Tf OSO2CF3 Thf C4H8O Tht C4H8S Tms SiMe3 Tol C6H4Me Vi C2H3 Wp W(CO)2Cp Xy C6H3Me2
Chemputer, a set of simple calculators for chemistry: https://winter.group.shef.ac.uk/chemputer/
Copyright 1993-2021 Prof Mark J. Winter [Department of Chemistry, The University of Sheffield]. All rights reserved.