| gptkbp:instanceOf | gptkb:mole 
 | 
                        
                            
                                | gptkbp:band | alternating single and triple bonds 
 | 
                        
                            
                                | gptkbp:CASNumber | 1236333-40-6 
 | 
                        
                            
                                | gptkbp:category | gptkb:allotrope_of_carbon carbon ring
 cyclic compound
 molecular carbon allotrope
 polyynic compound
 sp-hybridized carbon compound
 
 | 
                        
                            
                                | gptkbp:chemicalFormula | gptkb:C18 
 | 
                        
                            
                                | gptkbp:color | black 
 | 
                        
                            
                                | gptkbp:containsElement | carbon 
 | 
                        
                            
                                | gptkbp:discoveredBy | gptkb:A._J._Wilkinson gptkb:A._N._Khlobystov
 gptkb:A._R._Porter
 gptkb:G._F._Zheng
 gptkb:H._L._Anderson
 gptkb:J._M._Gottfried
 gptkb:K._Kaiser
 gptkb:L._Chi
 gptkb:L._M._Scriven
 gptkb:Liam_C._Wilson
 gptkb:R._J._Maurer
 Yuanbo Zhang
 
 | 
                        
                            
                                | gptkbp:discoveredIn | 2019 
 | 
                        
                            
                                | gptkbp:firstSynthesized | gptkb:Chinese_Academy_of_Sciences gptkb:Nanjing_University
 gptkb:University_of_Oxford
 gptkb:University_of_Warwick
 gptkb:IBM_Research_Europe
 
 | 
                        
                            
                                | gptkbp:hasSMILES | C1#CC#CC#CC#CC#CC#CC#C1 
 | 
                        
                            
                                | gptkbp:molecularWeight | 216.18 g/mol 
 | 
                        
                            
                                | gptkbp:notableFor | unstable under ambient conditions alternating bond lengths
 aromaticity debated
 high reactivity
 observed by atomic force microscopy
 potential for molecular electronics
 precursor is cyclocarbon oxide (C18O6)
 sp-hybridized carbon atoms
 synthesized on NaCl surface
 unique electronic structure
 
 | 
                        
                            
                                | gptkbp:numberOfCarbonAtoms | 18 
 | 
                        
                            
                                | gptkbp:publishedIn | Science, 2019 
 | 
                        
                            
                                | gptkbp:stateAtRoomTemperature | gptkb:stone 
 | 
                        
                            
                                | gptkbp:structureType | gptkb:King 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:C18 
 | 
                        
                            
                                | gptkbp:bfsLayer | 6 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | cyclo[18]carbon 
 |