Molecular Geometry & Lewis Structures
Electron-domain analysis, geometry, bond angle and step-by-step construction for SCl2 (CAS 10545-99-0) — with the practical supply context B2B and laboratory buyers need.
SCl2 has a Bent (V-shaped) molecular geometry (AX2E2, tetrahedral) with a bond angle of ≈103° (Cl–S–Cl). The central sulfur carries 2 bonding domain(s) and 2 lone pair(s) — 4 electron domains in total. The larger central atom places the angle between h2s's near-90° and water's 104.5°.
Hybridisation is conventionally described as sp3 (conventional description). Polarity: Polar.
| Parameter | Sulfur Dichloride (SCl2) |
|---|---|
| CAS Registry Number | 10545-99-0 |
| Molecular formula | SCl2 |
| Molar mass | 102.97 g/mol |
| Total valence electrons | 20 |
| Central atom | Sulfur |
| Bonding domains (σ) | 2 |
| Lone pairs on central atom | 2 |
| Electron domains (steric number) | 4 |
| Electron-pair geometry | Tetrahedral |
| Molecular geometry (shape) | Bent (V-shaped) |
| VSEPR notation | AX2E2 |
| Bond angle | ≈103° (Cl–S–Cl) |
| Hybridisation (conventional) | sp3 (conventional description) |
| Polarity | Polar. |
| Lewis structure guide | SCl2 Lewis structure |
Molar mass is the average value rounded for procurement use. Hybridisation labels are the conventional VSEPR-level description; orbital treatment becomes more nuanced at higher levels of theory.
A worked diagram of this molecule is kept in the companion guide: SCl2 Lewis structure.
VSEPR theory counts electron domains — every σ bond counts once regardless of bond order, and every lone pair counts once. SCl2 has 4 such domains around the sulfur: 2 bonding and 2 lone. 4 domains correspond to a tetrahedral electron-domain arrangement; with 2 lone pairs excluded from the shape the observed molecular shape is bent (v-shaped) (AX2E2).
Bond angle: ≈103° (Cl–S–Cl) because the larger central atom places the angle between H2S's near-90° and water's 104.5°.
Polarity: Polar.
Geometry shortcut for recall
Steric number 4 → parent arrangement tetrahedral; subtract 2 lone positions and the visible shape is bent (v-shaped). Same electron count, different lone-pair bookkeeping, different geometry — always count the domains before naming the shape.
Treating the bottle as a single pure compound — liquid SCl2/S2Cl2 equilibria are composition- and temperature-dependent, a real procurement trap.
Octet satisfied on sulfur.
Intermediate in polysulfide and thiuram vulcanisation-agent manufacture; commercial material sits in equilibrium with S2Cl2 and chlorine, so the active-chlorine assay on the COA defines what you actually bought.
Structure-level identity is exactly what a purchase order has to fix: the same molecular formula can hide isomers, hydrates or salt forms with different handling profiles. Before ordering, match CAS (10545-99-0), assay, water content and container rating against the datasheet, and request the COA batch that will ship.
Bent (V-shaped). The 4 electron domains around the central sulfur adopt a tetrahedral arrangement, and with 2 lone pairs in place the visible shape is bent (v-shaped).
≈103° (Cl–S–Cl), because the larger central atom places the angle between H2S's near-90° and water's 104.5°.
Polar.
SCl2 carries 2 lone pairs on the central sulfur.
Editorial note
This page explains molecular geometry and Lewis-structure construction for education and procurement due-diligence. It is not a safety datasheet; for handling, exposure and transport limits consult the current SDS and local regulations.
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