a. What is the molecular geometry of PF3? Enter th...

Question

a. What is the molecular geometry of PF3? Enter the molecular geometry of the molecule.b. What is the molecular geometry of BeF2? Enter the molecular geometry of the molecule.c. What is the molecular geometry of OF2? Enter the molecular geometry of the molecule.

Jules Bruno · Accepted Answer

[readmore](A.) PF3Phosphorous (EN = 2.1) is less electronegative than fluorine (EN = 4.0) → P is the central atom.         Group            Valence ElectronsP        5A                  1 × 8 e– = 5 e–F        7A                  3 × 7 e– = 21 e–          Total:  26 valence e–Note that halogens, when not the central atom, forms only 1 bond. The Lewis structure of PF3 is:There are three (3) atoms and one (1) lone pair around the central atom → AX3E1 or trigonal pyramidal.Thus, the molecular geometry of PF3 is trigonal pyramidal.(B.) BeF2Beryllium (EN = 1.5) is less electronegative than fluorine (EN = 4.0) → Be is the central atom.         Group            Valence ElectronsBe      2A                  1 × 2 e– = 2 e–F        7A                  2 × 7 e– = 14 e–           Total: 16 valence e–Note that halogens, when not the central atom, forms only 1 bond. The Lewis structure of BeF2 is:There are two (2) atoms and no lone pair around the central atom → AX2 or linear.Thus, the molecular geometry of BeF2 is linear.(C.) OF2Oxygen (EN = 3.5) is less electronegative than fluorine (EN = 4.0) → O is the central atom.         Group            Valence ElectronsO        6A                  1 × 6 e– =  6 e–F        7A                   2 × 7 e– = 14 e–          Total:  20 valence e–Note that halogens, when not the central atom, forms only 1 bond. The Lewis structure of OF2 is:There are two (2) atoms and two (2) lone pair around the central atom → AX2E2 or trigonal pyramidal.Thus, the molecular geometry of OF2 is bent or angular or V-shaped.

Problem: a. What is the molecular geometry of PF3? Enter the molecular geometry of the molecule.b. What is the molecular geometry of BeF2? Enter the molecular geometry of the molecule.c. What is the molecular geometry of OF2? Enter the molecular geometry of the molecule.

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Problem: a. What is the molecular geometry of PF3? Enter the molecular geometry of the molecule.b. What is the molecular geometry of BeF2? Enter the molecular geometry of the molecule.c. What is the molecular geometry of OF2? Enter the molecular geometry of the molecule.

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