Editing Isocyanate (section)

==Structure and bonding==
In terms of bonding, isocyanates are closely related to carbon dioxide (CO<sub>2</sub>) and [[carbodiimide]]s (C(NR)<sub>2</sub>).  The C−N=C=O unit that defines isocyanates is planar, and the N=C=O linkage is nearly linear.  In [[phenyl isocyanate]], the C=N and C=O distances are respectively 1.195 and 1.173&nbsp;[[angstrom|Å]].  The C−N=C angle is 134.9° and the N=C=O angle is 173.1°.<ref>{{cite journal | last1=Byrn | first1=Marianne P. | last2=Curtis | first2=Carol J. | last3=Hsiou | first3=Yu | last4=Khan | first4=Saeed I. | last5=Sawin | first5=Philip A. | last6=Tendick | first6=S. Kathleen | last7=Terzis | first7=Aris | last8=Strouse | first8=Charles E. | title=Porphyrin sponges: conservative of host structure in over 200 porphyrin-based lattice clathrates | journal=Journal of the American Chemical Society | publisher=American Chemical Society (ACS) | volume=115 | issue=21 | year=1993 | issn=0002-7863 | doi=10.1021/ja00074a013 | pages=9480–9497| bibcode=1993JAChS.115.9480B }}</ref>