Question

Which of the following compounds exhibit at least one bond angle the is approximately 120°7 Select "yes" for molecules with a 120° bond angle, and "no" for all others. no XeCl2 yes IF no Selo no KrF4 yes TeC14 no IFs yes PCs These molecules are exceptions to the octet rule since there is no way to satisfy the octet rule with this many valence electrons. Therefore, the geometries to reference are trigonal bypyramidal and octahedral. As is always the case, the geometry determines bond angles and hybridization. For these molecules, there may be two or three different bond angles. The shape of the molecule is determined by the relative placement of the atoms. The various shapes are summarized in the "VSEPR Models link. To predict polarity, draw in the individual bond dipoles. If they all cancel then the molecule is nonpolar, and if the individual bond dipoles do not all cancel, then the molecule is polar.

Answer 1

xech xe Coundstale valence electrony 552 506 Excited state Tur [TV, Iru 11 ] [TITTII spyd sped by briclisation sresults in tougenal bipyramidal geometry. The Lone pairs (37 present here occupy Equatorial positions and bend pairs occupy axial positions resulting in linear Shape, with bond angle of 180° 1fz There are a lone pairs and 3 bond pairs and prefers trigonel bipyramida geometry.' I F The Shape corained is T- shape since Ithe powrs occupy equatoual position Here bond angles are 1809 & 90'. se has 6 bond pairs around it and they occupy octahedra posibors. ch Bond angle is 90° Secto alla KE ke har Geometry 4 band pairs and is octahedrai and a love pairs. shape is square planar, F T F bond angle is 90°. Xe đi .

loue Tech I Te has 1 boikein pain and 4 bond pairs. The geometry is Trigona bipyramidal. Shape is see saw since lone pair occupies the equalo sia positions. The bond angeet expected are 90" & 120" However, due to presence of love pain, <they get slightly distorted , bond angles would be slightly len than 90° & 120'. IFs "I" has 5 bond pairs and I love pain Geometry is octahedral and the shape is square Pyramic al since lone pain Occupied one of the positions. TD13 +hti FF Boud angle is expected to be 96, but it is slightly less than 90' and is around 81.9 due to repcelsions caused by lone pain Pels "p' has 5 bond pairs around it and stie geometry is Torgonal bipyramidal. Shape is also trigonal bipyramica Bond angles are 120° and 90'. boud angles In summary Geomcha shape Xecte - > Trigonalbipyramidallinecer 180° IF3 - Tougonal bipyramidal 7- shape 180' 90' Secto - Octahedral o crahedral 90' B92 - Octahedral square planar 90° Tech Tiganal bipyramidal see-saw shape <909 & 21200 Its - Octahedral Square pyramidal 81.90 pels - Trigonel bipyramid at Triganal bipyramidal 90", 120°