Question

Predicting and Drawing Shapes of Molecules Complete the following chart: Lewis diagram Molecular Formula Name of VSEPR shape Dipole yes/no CCIA Tetrahedron NO NI; Trigonal pyromiton SeFG actahedral No SiF4 yes NF3 SCHOD GONEE 1-0 CINO yes H2S - Tetrahedral - - Tagored ograma - Bent shops H-SH. Bent shape - Telephedral H-CEN: Lincos I NO 0-N-8: Trigonal planar H-N-H NHA+ Tetrahedral NO 924 HCN H@CON NO, PS Trigonal plomor SOZ kind of diagrom would be better Didn't know which so I drew both.

I need to say reason for why is it dipole or no for each.

Answer 1

zero dipole moment include all non polar molecules like H2, N2, O2, Cl2 etc ( Homodiatomic molecules).

But zero dipole moment is not only due to non polar bonds of zero electronegative difference. Few compounds are Polar to but have zero dipole moment because they have symmetry and dipole moment is a vector quantity so the resultant of equal and opposite vectors is zero.. It is due to their symmetric structure the resultant dipole is zero.

reno dipole: I of Tetrahedral cau a la - u (symmetric) Clly is symmetric tetrahedral compound. Dipole bezero because resultant of equal & opposite vetors is zero F F se octahedral SEFG F F Coymmetric) ndipole zero -77 I Sify tetrahedral, symmetric - dipole zero Point z-I - tetrahedral, symmetric N H dipole zero

N o N. Resonating structure trigonal planar Resultant dipole bezero I Non zero di pole momenti 6. A+ Net dipote moment N 13 N Not symmetric Electronegativity of Nen greater than hence direction of dipole moment be towarde nitrogen. + NE N Not symmetric Fyf direction of dipole moment be opposite to Ndue to higher electronegativity of fluorine- UNO 4-NZO- Not Aymmetric So bend structure Has HTXH Renutant dipole direction towards s.

TZ netic H-CEN - Not symmetric 502 o bend structure. Since ou more electronegative to s direction of .. dipole be opposite to S.