{"id":16222,"date":"2025-06-11T08:02:18","date_gmt":"2025-06-11T08:02:18","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=16222"},"modified":"2025-06-11T08:02:31","modified_gmt":"2025-06-11T08:02:31","slug":"use-vsepr-to-predict-the-most-stable-structures-of-the-following-species","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/use-vsepr-to-predict-the-most-stable-structures-of-the-following-species\/","title":{"rendered":"Use VSEPR to predict the most stable structures of the following species"},"content":{"rendered":"\n

Use VSEPR to predict the most stable structures of the following species: <\/p>\n\n\n\n

A. SCl2F4 <\/p>\n\n\n\n

B. XeO2 <\/p>\n\n\n\n

C. SiH3- <\/p>\n\n\n\n

D. BH3<\/p>\n\n\n\n

The correct answer and explanation is:<\/strong><\/mark><\/p>\n\n\n\n

Here are the VSEPR-based most stable geometries for each species:<\/p>\n\n\n\n

\n\n\n\n

A. SCl\u2082F\u2084<\/strong><\/h3>\n\n\n\n

Structure<\/strong>: Trigonal bipyramidal<\/strong> electron geometry
Shape<\/strong>: Seesaw<\/strong><\/p>\n\n\n\n

    \n
  • Explanation<\/strong>: Sulfur (S) has 6 valence electrons. In SCl\u2082F\u2084, it’s bonded to 6 atoms (2 Cl, 4 F), meaning 6 regions of electron density. However, this suggests hypervalency, possible for third-period elements like sulfur. The molecule adopts a trigonal bipyramidal<\/strong> geometry.
    To minimize electron pair repulsion, the more electronegative fluorines occupy equatorial positions<\/strong>, and the larger chlorine atoms go in the axial positions. This results in a seesaw shape<\/strong> when lone pairs (if any) are factored in. But in this case, there are no lone pairs, just bonded atoms. The actual 3D arrangement is a distorted trigonal bipyramidal<\/strong>.<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    B. XeO\u2082<\/strong><\/h3>\n\n\n\n

    Structure<\/strong>: Bent<\/strong><\/p>\n\n\n\n

      \n
    • Explanation<\/strong>: Xenon (Xe) has 8 valence electrons. In XeO\u2082, it’s bonded to two O atoms (2 regions) and has two lone pairs, for a total of 4 electron regions.
      According to VSEPR (AX\u2082E\u2082), this gives a bent<\/strong> shape, similar to H\u2082O. The lone pairs repel more strongly than bonding pairs, pushing the O atoms closer together.<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n

      C. SiH\u2083\u207b<\/strong><\/h3>\n\n\n\n

      Structure<\/strong>: Trigonal pyramidal<\/strong><\/p>\n\n\n\n

        \n
      • Explanation<\/strong>: Silicon (Si) has 4 valence electrons. It forms three bonds with hydrogen and gains one extra electron due to the negative charge, giving 4 regions of electron density (3 bonding + 1 lone pair).
        This corresponds to AX\u2083E<\/strong>, which results in a trigonal pyramidal<\/strong> geometry, similar to ammonia (NH\u2083).<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n

        D. BH\u2083<\/strong><\/h3>\n\n\n\n

        Structure<\/strong>: Trigonal planar<\/strong><\/p>\n\n\n\n

          \n
        • Explanation<\/strong>: Boron (B) has 3 valence electrons and forms three bonds with hydrogen, for a total of 3 bonding pairs and no lone pairs<\/strong>.
          This results in an AX\u2083<\/strong> arrangement and a trigonal planar<\/strong> geometry. BH\u2083 is electron-deficient, which makes it reactive and prone to dimerization (forming B\u2082H\u2086).<\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n

          Summary of Structures<\/strong>:<\/h3>\n\n\n\n
            \n
          • SCl\u2082F\u2084<\/strong> \u2013 Seesaw (trigonal bipyramidal base)<\/li>\n\n\n\n
          • XeO\u2082<\/strong> \u2013 Bent<\/li>\n\n\n\n
          • SiH\u2083\u207b<\/strong> \u2013 Trigonal pyramidal<\/li>\n\n\n\n
          • BH\u2083<\/strong> \u2013 Trigonal planar<\/li>\n<\/ul>\n\n\n\n

            These geometries are predicted using the Valence Shell Electron Pair Repulsion (VSEPR)<\/strong> model, which minimizes repulsions between electron pairs around a central atom.<\/p>\n","protected":false},"excerpt":{"rendered":"

            Use VSEPR to predict the most stable structures of the following species: A. SCl2F4 B. XeO2 C. SiH3- D. BH3 The correct answer and explanation is: Here are the VSEPR-based most stable geometries for each species: A. SCl\u2082F\u2084 Structure: Trigonal bipyramidal electron geometryShape: Seesaw B. XeO\u2082 Structure: Bent C. SiH\u2083\u207b Structure: Trigonal pyramidal D. BH\u2083 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-16222","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/16222","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=16222"}],"version-history":[{"count":2,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/16222\/revisions"}],"predecessor-version":[{"id":16224,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/16222\/revisions\/16224"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=16222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=16222"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=16222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}