“…Table 4 provides the cohesive energies and structural data of the planar group IV carbides SiC, [112][113][114][115][116][117] GeC, 115,[118][119][120] and SnC 115,121,122 and the buckled monolayers SiGe, 115,123,124,128 SnSi, 115,122,125,126 and SnGe. 115,122,125,126 The dependence of the cohesive energy on bond length of these binary compounds is displayed in Fig.…”